diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c488abd71a3e27190965e0.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c488abd71a3e27190965e0.md
index 13155f5edcf..d1bba4d441a 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c488abd71a3e27190965e0.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c488abd71a3e27190965e0.md
@@ -53,7 +53,7 @@ This word is used to say "hi" to someone. The first letter is capitalized.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 0.35,
       "finishTimestamp": 2.18
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c84d44d91406c37b3ad73f.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c84d44d91406c37b3ad73f.md
index e24af24eb46..2bf711a8f43 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c84d44d91406c37b3ad73f.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c84d44d91406c37b3ad73f.md
@@ -51,7 +51,7 @@ The word `días` has an accent mark on the `í`. In Spanish, accent marks indica
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 0.35,
       "finishTimestamp": 2.18
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c88a1c3f01ed15c7ca6c83.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c88a1c3f01ed15c7ca6c83.md
index 46bec330277..e3c4e249572 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c88a1c3f01ed15c7ca6c83.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c88a1c3f01ed15c7ca6c83.md
@@ -81,7 +81,7 @@ Focus on the last word of the sentence.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 2.39,
       "finishTimestamp": 3.63
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8902d3560395c800ddff5.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8902d3560395c800ddff5.md
index 7d7e54e57ff..a465aa2f62e 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8902d3560395c800ddff5.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8902d3560395c800ddff5.md
@@ -51,7 +51,7 @@ In conversation, it's much more natural than other forms, like `Mi nombre es...`
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 2.39,
       "finishTimestamp": 3.63
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8913e317c32689cfaf3c4.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8913e317c32689cfaf3c4.md
index bfa38102dc5..450e18eba8f 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8913e317c32689cfaf3c4.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8913e317c32689cfaf3c4.md
@@ -83,7 +83,7 @@ This means "developer", but it's not what she is saying. Pay attention to the la
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 3.88,
       "finishTimestamp": 5.42
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8924a2a6a5773c6d1a06d.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8924a2a6a5773c6d1a06d.md
index 67626ff63d3..4f0ce14f5ba 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8924a2a6a5773c6d1a06d.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8924a2a6a5773c6d1a06d.md
@@ -53,7 +53,7 @@ Even without `yo`, the sentence is complete and natural in Spanish.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 3.88,
       "finishTimestamp": 5.42
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c892f78e9dd27b55a0dc18.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c892f78e9dd27b55a0dc18.md
index 5cfafd7c192..1e233b08a03 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c892f78e9dd27b55a0dc18.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c892f78e9dd27b55a0dc18.md
@@ -51,7 +51,7 @@ This word includes the letter `ñ`, which is its own letter in the Spanish alpha
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 3.88,
       "finishTimestamp": 5.42
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c893dd7bbd1e85869d0e5b.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c893dd7bbd1e85869d0e5b.md
index 9a63d33d6c3..d544d8ecb2c 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c893dd7bbd1e85869d0e5b.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c893dd7bbd1e85869d0e5b.md
@@ -69,7 +69,7 @@ Notice the accent mark on the `ó`. It's important for correct pronunciation and
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 5.68,
       "finishTimestamp": 7.56
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c896d45893e91d602f0373.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c896d45893e91d602f0373.md
index f88f29b0be6..e1db7b6fc3f 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c896d45893e91d602f0373.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c896d45893e91d602f0373.md
@@ -77,7 +77,7 @@ Camila is not saying "good night".
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 0.3,
       "finishTimestamp": 2.13
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8974b9d5ddd2334b965c0.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8974b9d5ddd2334b965c0.md
index d17895fb8d4..b4d49c842de 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8974b9d5ddd2334b965c0.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8974b9d5ddd2334b965c0.md
@@ -51,7 +51,7 @@ In Spanish, `tardes` is a **feminine plural noun**, so the word `buenas` (good)
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 0.3,
       "finishTimestamp": 2.13
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c897a539d3dd283ffa3713.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c897a539d3dd283ffa3713.md
index 3fada2e291b..7b0d3162f8e 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c897a539d3dd283ffa3713.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c897a539d3dd283ffa3713.md
@@ -87,7 +87,7 @@ This is a common name, but not the one spoken.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 2.34,
       "finishTimestamp": 3.43
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c897fe7948d82ccadf1f3b.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c897fe7948d82ccadf1f3b.md
index d2271ca375e..699b33b6514 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c897fe7948d82ccadf1f3b.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c897fe7948d82ccadf1f3b.md
@@ -83,7 +83,7 @@ This example sentence works for both male and female.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 3.67,
       "finishTimestamp": 4.81
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8989990f68b3450a32db9.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8989990f68b3450a32db9.md
index aff9ab917f8..1d5f5f0eadd 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8989990f68b3450a32db9.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8989990f68b3450a32db9.md
@@ -61,7 +61,7 @@ Even though the subject `yo` (I) is not written, it's understood from the verb f
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 2.34,
       "finishTimestamp": 4.81
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8992767e7eb3ae4b4e5fe.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8992767e7eb3ae4b4e5fe.md
index ca2c0e3426a..f7f15021c0b 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8992767e7eb3ae4b4e5fe.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c8992767e7eb3ae4b4e5fe.md
@@ -51,7 +51,7 @@ In Spanish, many professions that end in `-a` don't change with gender. `Analist
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 3.67,
       "finishTimestamp": 4.81
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89979e06c663f1b4fff0d.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89979e06c663f1b4fff0d.md
index 924389c2fe4..a986ae7847c 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89979e06c663f1b4fff0d.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89979e06c663f1b4fff0d.md
@@ -75,7 +75,7 @@ This phrase has **two words** and means "See you soon". It's a friendly way to s
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 4.9,
       "finishTimestamp": 7.5
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89b3cd3083152e0f23eb0.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89b3cd3083152e0f23eb0.md
index ba4ceab4eaf..be43b7d506b 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89b3cd3083152e0f23eb0.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89b3cd3083152e0f23eb0.md
@@ -83,7 +83,7 @@ In Spanish, you can use `Buenas noches` both when greeting someone in the evenin
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 0.2,
       "finishTimestamp": 1.8
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89c988b6c9f6207ad9cac.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89c988b6c9f6207ad9cac.md
index 28c526a0654..9f0f2a73979 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89c988b6c9f6207ad9cac.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89c988b6c9f6207ad9cac.md
@@ -59,7 +59,7 @@ In Spanish, you can use `Buenas noches` both when greeting someone in the evenin
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 0.2,
       "finishTimestamp": 1.8
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89cd5229c18653d7d66be.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89cd5229c18653d7d66be.md
index 89b379b5947..48e1a6a0a79 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89cd5229c18653d7d66be.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89cd5229c18653d7d66be.md
@@ -51,7 +51,7 @@ It's the standard way to introduce yourself. For example:
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 2.01,
       "finishTimestamp": 3.01
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89d073ef3c56824a1c783.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89d073ef3c56824a1c783.md
index 3cd2dd0fc04..41c094baafc 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89d073ef3c56824a1c783.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89d073ef3c56824a1c783.md
@@ -51,7 +51,7 @@ In Spanish, you **don't need an article** like "a" or "an" before professions. F
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 3.49,
       "finishTimestamp": 4.97
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89d77ea2edc6d84388cb7.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89d77ea2edc6d84388cb7.md
index 219ca63a293..5b1900e9b1b 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89d77ea2edc6d84388cb7.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68c89d77ea2edc6d84388cb7.md
@@ -71,7 +71,7 @@ There are two common spellings of the word `chao`:
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 5.35,
       "finishTimestamp": 7.11
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68de9ae56303f3834466ce1c.md b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68de9ae56303f3834466ce1c.md
index b088b6bbec8..97aa9cf799e 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68de9ae56303f3834466ce1c.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-greetings-during-the-day/68de9ae56303f3834466ce1c.md
@@ -79,7 +79,7 @@ There is no request or command in this phrase.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 5.35,
       "finishTimestamp": 7.11
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e56ba74d1914de028d9a5.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e56ba74d1914de028d9a5.md
index 07eb2c07c71..1223879a32f 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e56ba74d1914de028d9a5.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e56ba74d1914de028d9a5.md
@@ -64,7 +64,7 @@ It's the most common way to ask someone their name in an informal setting (using
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 0.76,
       "finishTimestamp": 3.74
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e5c1b0c20a951beb34d89.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e5c1b0c20a951beb34d89.md
index facaa184cc8..a30c11303d8 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e5c1b0c20a951beb34d89.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e5c1b0c20a951beb34d89.md
@@ -68,7 +68,7 @@ When the word `Cómo` is used to ask a question, it should have an accent mark i
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 0.76,
       "finishTimestamp": 3.74
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e5db95d4ade5410ae4aea.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e5db95d4ade5410ae4aea.md
index 02b84ef76bd..b73fc1d7a58 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e5db95d4ade5410ae4aea.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e5db95d4ade5410ae4aea.md
@@ -82,7 +82,7 @@ Therefore, the speaker's name is `Sebastián`.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 5.09,
       "finishTimestamp": 6.36
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e640d82be9a5b5539bab0.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e640d82be9a5b5539bab0.md
index 61f50aa7121..c407638928f 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e640d82be9a5b5539bab0.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e640d82be9a5b5539bab0.md
@@ -64,7 +64,7 @@ The complete phrase is `Mi nombre es Sebastián`, which means "My name is Sebast
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 5.09,
       "finishTimestamp": 6.36
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e68d68dff8f607f651658.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e68d68dff8f607f651658.md
index 3f65d78f2f3..8334337caa2 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e68d68dff8f607f651658.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e68d68dff8f607f651658.md
@@ -82,7 +82,7 @@ Sebastián says `Me llaman Basti` ("They call me Basti"), so `Basti` is his nick
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 6.78,
       "finishTimestamp": 7.92
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6b63edc0e0658d8f1eba.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6b63edc0e0658d8f1eba.md
index 31f843ea430..21e4fd60c29 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6b63edc0e0658d8f1eba.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6b63edc0e0658d8f1eba.md
@@ -56,7 +56,7 @@ The complete phrase is `Me llaman Basti`, which means "They call me Basti".
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 6.78,
       "finishTimestamp": 7.92
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6d806191306870c924c1.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6d806191306870c924c1.md
index 56d19cb67b1..5a728232839 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6d806191306870c924c1.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6d806191306870c924c1.md
@@ -74,7 +74,7 @@ Therefore, `Ángela` is the speaker's name.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 9.58,
       "finishTimestamp": 10.84
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6ee180beed6aa929ee4d.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6ee180beed6aa929ee4d.md
index 88561357b3b..6166f9d163d 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6ee180beed6aa929ee4d.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e6ee180beed6aa929ee4d.md
@@ -91,7 +91,7 @@ It's one of the most common phrases used to reply after someone has introduced t
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 12.77,
       "finishTimestamp": 13.95
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e7403d7c1a272295bb2b0.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e7403d7c1a272295bb2b0.md
index 70706455eb6..48f1409a9e5 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e7403d7c1a272295bb2b0.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690e7403d7c1a272295bb2b0.md
@@ -80,7 +80,7 @@ Sebastián is asking Ángela `¿De dónde eres?` to know where she is from.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 14.27,
       "finishTimestamp": 15.32
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f5a015ec6842542a57d60.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f5a015ec6842542a57d60.md
index 0c8dd37b303..cc93e34edc9 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f5a015ec6842542a57d60.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f5a015ec6842542a57d60.md
@@ -86,7 +86,7 @@ Therefore, Ángela is from El Salvador.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 16.26,
       "finishTimestamp": 18.11
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f5cb4a5bd682a05ab4242.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f5cb4a5bd682a05ab4242.md
index 5c82b1fffc8..680319e3714 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f5cb4a5bd682a05ab4242.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f5cb4a5bd682a05ab4242.md
@@ -92,7 +92,7 @@ Since Ángela is a female, she uses the feminine form of the nationality: `salva
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 18.35,
       "finishTimestamp": 19.71
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f61b1a2b78d305e825d13.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f61b1a2b78d305e825d13.md
index 42a038c4774..5985e14311e 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f61b1a2b78d305e825d13.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f61b1a2b78d305e825d13.md
@@ -56,7 +56,7 @@ This is a regional variation of `tú` ("you").
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 19.85,
       "finishTimestamp": 20.47
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f66818d456538fbba06e4.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f66818d456538fbba06e4.md
index b412b7519b0..48ecd39aaaa 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f66818d456538fbba06e4.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f66818d456538fbba06e4.md
@@ -58,7 +58,7 @@ Therefore, Sebastián is not from Costa Rica.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 21.59,
       "finishTimestamp": 22.7
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f68686781213c9eac4b65.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f68686781213c9eac4b65.md
index 5b4e236eb22..6d550de607d 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f68686781213c9eac4b65.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f68686781213c9eac4b65.md
@@ -68,7 +68,7 @@ Therefore, this is true because Ángela is asking Sebastián about his age.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 25.92,
       "finishTimestamp": 27.32
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6ad7e1192b412653189c.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6ad7e1192b412653189c.md
index 6e2d81a573e..ba8f08e5814 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6ad7e1192b412653189c.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6ad7e1192b412653189c.md
@@ -62,7 +62,7 @@ It's important to remember that questions in Spanish start with an opening quest
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 25.92,
       "finishTimestamp": 27.32
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6d6c27b78644af22a833.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6d6c27b78644af22a833.md
index f456f608f44..30444fee433 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6d6c27b78644af22a833.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6d6c27b78644af22a833.md
@@ -84,7 +84,7 @@ After saying his age, Sebastián returns the question to Ángela with `¿Y tú?`
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 28.69,
       "finishTimestamp": 30.77
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6f11d51d16478c286346.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6f11d51d16478c286346.md
index e2bd853f9e9..1058ee03575 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6f11d51d16478c286346.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f6f11d51d16478c286346.md
@@ -86,7 +86,7 @@ Therefore, Sebastián is asking about Ángela's profession.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 35.51,
       "finishTimestamp": 37.05
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f70f98d43b24acc706a72.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f70f98d43b24acc706a72.md
index b2b8c1f3b3e..3b774167f6b 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f70f98d43b24acc706a72.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f70f98d43b24acc706a72.md
@@ -96,7 +96,7 @@ Therefore, Ángela is a human resources representative.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 38.3,
       "finishTimestamp": 40.86
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f862639740057f3ded75e.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f862639740057f3ded75e.md
index 84992e23596..fc076bcdf25 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f862639740057f3ded75e.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f862639740057f3ded75e.md
@@ -76,7 +76,7 @@ Its role is very similar to `Mucho gusto` in an introduction.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 45.14,
       "finishTimestamp": 47.38
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f89a537e5a15bceeed373.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f89a537e5a15bceeed373.md
index d142582fc16..4e2fb357927 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f89a537e5a15bceeed373.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f89a537e5a15bceeed373.md
@@ -60,7 +60,7 @@ This phrase has the same purpose as `Mucho gusto` in an introduction.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 45.14,
       "finishTimestamp": 47.38
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f8b36b9f7a95e9a85adef.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f8b36b9f7a95e9a85adef.md
index 9123014fb31..0cffeb64991 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f8b36b9f7a95e9a85adef.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/690f8b36b9f7a95e9a85adef.md
@@ -74,7 +74,7 @@ The phrase `Igualmente` translates to "Likewise".
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 48.68,
       "finishTimestamp": 49.51
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/69150542094cd0569af7c631.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/69150542094cd0569af7c631.md
index 74900b43085..35e09d1597e 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/69150542094cd0569af7c631.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/69150542094cd0569af7c631.md
@@ -78,7 +78,7 @@ Sebastián asks `¿Y tú?` at the end of this part of the conversation to return
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 6.78,
       "finishTimestamp": 8.79
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d1d38ca358189af1ab08.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d1d38ca358189af1ab08.md
index 7b0e0f98c2c..d4c1535cb0d 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d1d38ca358189af1ab08.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d1d38ca358189af1ab08.md
@@ -56,7 +56,7 @@ The complete phrase is `Me llamo Ángela`, which means "My name is Ángela".
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 9.58,
       "finishTimestamp": 10.84
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d2fd70e1631a7c2c035e.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d2fd70e1631a7c2c035e.md
index 0162d4419fd..8d4dd275f30 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d2fd70e1631a7c2c035e.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d2fd70e1631a7c2c035e.md
@@ -56,7 +56,7 @@ The complete phrase is `Soy de El Salvador`, which means "I am from El Salvador"
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 16.26,
       "finishTimestamp": 18.11
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d44e280a531d2f1c2bb1.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d44e280a531d2f1c2bb1.md
index e309578929e..24726f3b8aa 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d44e280a531d2f1c2bb1.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d44e280a531d2f1c2bb1.md
@@ -48,7 +48,7 @@ The complete phrase is `Soy salvadoreña`, which means "I am Salvadoran".
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 18.35,
       "finishTimestamp": 19.71
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d734d182222357aff8d7.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d734d182222357aff8d7.md
index 7b375875792..6bb0d5f5351 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d734d182222357aff8d7.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d734d182222357aff8d7.md
@@ -48,7 +48,7 @@ The complete phrase is `Soy de Guatemala`, which means "I am from Guatemala".
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 21.59,
       "finishTimestamp": 22.7
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d83a16f43c25b3f978c7.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d83a16f43c25b3f978c7.md
index 03378bea987..53f0c96f493 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d83a16f43c25b3f978c7.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d83a16f43c25b3f978c7.md
@@ -74,7 +74,7 @@ Sebastián says `Soy guatemalteco`, which means "I am Guatemalan".
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 23.45,
       "finishTimestamp": 24.61
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d99c51f4782817abd129.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d99c51f4782817abd129.md
index 1a85e982dd2..2ca7d771e03 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d99c51f4782817abd129.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915d99c51f4782817abd129.md
@@ -50,7 +50,7 @@ The complete sentence is `Soy guatemalteco`, which means "I am Guatemalan".
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 23.45,
       "finishTimestamp": 24.61
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e51b2abe35343f9b79cf.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e51b2abe35343f9b79cf.md
index f0a80496cec..4a3259ff035 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e51b2abe35343f9b79cf.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e51b2abe35343f9b79cf.md
@@ -72,7 +72,7 @@ How old is Ángela?
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 31.8,
       "finishTimestamp": 33.68
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e72256d30f37056ac39e.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e72256d30f37056ac39e.md
index f19db38b6e9..ec2228509b3 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e72256d30f37056ac39e.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e72256d30f37056ac39e.md
@@ -52,7 +52,7 @@ The complete sentence is `Tengo veintiún años`, which means "I am twenty-one y
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 28.69,
       "finishTimestamp": 30.02
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e8d7b68cb73a9c9b89fe.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e8d7b68cb73a9c9b89fe.md
index cea759764a7..e5bd8718a76 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e8d7b68cb73a9c9b89fe.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915e8d7b68cb73a9c9b89fe.md
@@ -48,7 +48,7 @@ The complete sentence is `Tengo treinta y cinco años`, which means "I am thirty
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 31.8,
       "finishTimestamp": 33.68
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915eab337b5573e73cc5fbf.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915eab337b5573e73cc5fbf.md
index 3082ede22cc..97a15c462b8 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915eab337b5573e73cc5fbf.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915eab337b5573e73cc5fbf.md
@@ -50,7 +50,7 @@ The complete sentence is `Soy representante de recursos humanos. ¿Y vos?`, whic
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 38.3,
       "finishTimestamp": 41.59
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915ebb4c0915b41248f387e.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915ebb4c0915b41248f387e.md
index 93c1430b1f3..dc9cca9629b 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915ebb4c0915b41248f387e.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915ebb4c0915b41248f387e.md
@@ -58,7 +58,7 @@ The complete sentence is `Soy representante de recursos humanos. ¿Y vos?`, whic
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 38.3,
       "finishTimestamp": 41.59
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915eca78be9dc43790f3025.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915eca78be9dc43790f3025.md
index 8584d9ede47..b22034da6a7 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915eca78be9dc43790f3025.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915eca78be9dc43790f3025.md
@@ -72,7 +72,7 @@ Sebastián says `Soy analista junior`, which means "I am a junior analyst".
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 42.6,
       "finishTimestamp": 44.25
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915ed88d969cb45865f84ab.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915ed88d969cb45865f84ab.md
index 9e433f5626a..0ac6d952c72 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915ed88d969cb45865f84ab.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915ed88d969cb45865f84ab.md
@@ -56,7 +56,7 @@ The complete sentence is `Soy analista junior`, which means "I am a junior analy
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 42.6,
       "finishTimestamp": 44.25
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915f062758b5b505dc60d9c.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915f062758b5b505dc60d9c.md
index 00af28ddbb4..d0484e0cbba 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915f062758b5b505dc60d9c.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6915f062758b5b505dc60d9c.md
@@ -50,7 +50,7 @@ It's a common and polite one-word response to an introduction. It lets the other
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 48.68,
       "finishTimestamp": 49.51
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6916019cc2aa0367de683686.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6916019cc2aa0367de683686.md
index 1e4f4f3e1d9..98d789166d9 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6916019cc2aa0367de683686.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/6916019cc2aa0367de683686.md
@@ -56,7 +56,7 @@ The complete phrase is `Mucho gusto, Ángela`, which means "Nice to meet you, Á
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 12.77,
       "finishTimestamp": 13.95
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/69160253e5339069a251cd9a.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/69160253e5339069a251cd9a.md
index 837f0b1bc57..441a8c7776c 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/69160253e5339069a251cd9a.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-angela-and-basti/69160253e5339069a251cd9a.md
@@ -68,7 +68,7 @@ This question must have the preposition `de` ("from") at the beginning, and the
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 14.27,
       "finishTimestamp": 15.32
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/68dc74dc55e05b6ee15b743d.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/68dc74dc55e05b6ee15b743d.md
index 36751ab63e4..ed58b2b3e96 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/68dc74dc55e05b6ee15b743d.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/68dc74dc55e05b6ee15b743d.md
@@ -68,7 +68,7 @@ Spanish greetings vary depending on the time of day. For example:
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.3.mp3",
+      "filename": "ES_A1_spanish_meet_julieta.mp3",
       "startTime": 1,
       "startTimestamp": 0.61,
       "finishTimestamp": 2.44
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/69050330908fe2245936bf21.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/69050330908fe2245936bf21.md
index d84693c4cd1..66fb6b6dbf5 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/69050330908fe2245936bf21.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/69050330908fe2245936bf21.md
@@ -80,7 +80,7 @@ This profession involves designing buildings, which is unrelated to what Julieta
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.3.mp3",
+      "filename": "ES_A1_spanish_meet_julieta.mp3",
       "startTime": 1,
       "startTimestamp": 4.05,
       "finishTimestamp": 5.9
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/690a2aca25b9d771e2dd1101.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/690a2aca25b9d771e2dd1101.md
index dc31fa7b0c4..f526d8e2c93 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/690a2aca25b9d771e2dd1101.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/690a2aca25b9d771e2dd1101.md
@@ -74,7 +74,7 @@ This nationality refers to Colombia.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.3.mp3",
+      "filename": "ES_A1_spanish_meet_julieta.mp3",
       "startTime": 1,
       "startTimestamp": 6.12,
       "finishTimestamp": 7.21
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/690a2ca5e5cfb078be515fc7.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/690a2ca5e5cfb078be515fc7.md
index d936ac0bba0..9afaa52f5f8 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/690a2ca5e5cfb078be515fc7.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/690a2ca5e5cfb078be515fc7.md
@@ -89,7 +89,7 @@ The word `años` has a tilde (~) over the "n".
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.3.mp3",
+      "filename": "ES_A1_spanish_meet_julieta.mp3",
       "startTime": 1,
       "startTimestamp": 7.39,
       "finishTimestamp": 9.16
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/69165d13fdec0a457abf861d.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/69165d13fdec0a457abf861d.md
index 53d40fdfaa3..1b91a2ef53c 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/69165d13fdec0a457abf861d.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/69165d13fdec0a457abf861d.md
@@ -76,7 +76,7 @@ The phrase `hasta mañana` literally means *"until tomorrow",* but its everyday
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.3.mp3",
+      "filename": "ES_A1_spanish_meet_julieta.mp3",
       "startTime": 1,
       "startTimestamp": 9.33,
       "finishTimestamp": 11.25
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/6916658d16916957c1a318a9.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/6916658d16916957c1a318a9.md
index 2862ee2c0ed..842e5e665dd 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/6916658d16916957c1a318a9.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-julieta/6916658d16916957c1a318a9.md
@@ -50,7 +50,7 @@ The phrase `Hasta mañana` means **"see you tomorrow."** The word `chao` is an i
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.3.mp3",
+      "filename": "ES_A1_spanish_meet_julieta.mp3",
       "startTime": 1,
       "startTimestamp": 9.33,
       "finishTimestamp": 11.25
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/68dc747c75837c6bb82aeeb8.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/68dc747c75837c6bb82aeeb8.md
index c72da052ed4..0485ad54ccf 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/68dc747c75837c6bb82aeeb8.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/68dc747c75837c6bb82aeeb8.md
@@ -76,7 +76,7 @@ This is an informal greeting to say hi and ask how the person is doing, but it d
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 0.39,
       "finishTimestamp": 2.25
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69038829cfac799092c44c5e.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69038829cfac799092c44c5e.md
index fab25917c28..0c6d978680b 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69038829cfac799092c44c5e.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69038829cfac799092c44c5e.md
@@ -70,7 +70,7 @@ Remember, the structure uses a **reflexive pronoun** (`me`) and the **verb** `ll
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 2.4,
       "finishTimestamp": 3.49
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6903913aedf7c8a38ed31413.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6903913aedf7c8a38ed31413.md
index d7fdd3bb9f4..e2f8904914e 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6903913aedf7c8a38ed31413.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6903913aedf7c8a38ed31413.md
@@ -94,7 +94,7 @@ The verb `soy` comes from `ser` and is used here to describe Luna's nationality.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 5.63,
       "finishTimestamp": 6.61
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6903b0a4fca844c1bb1d9b84.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6903b0a4fca844c1bb1d9b84.md
index c4c1e50ec57..bf45db21442 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6903b0a4fca844c1bb1d9b84.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6903b0a4fca844c1bb1d9b84.md
@@ -101,7 +101,7 @@ The word `años` means **years**. Notice the special character `ñ`.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 6.87,
       "finishTimestamp": 8.59
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69137d8fd9f81f7c0f229ac5.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69137d8fd9f81f7c0f229ac5.md
index 89f28436ac9..1292b4cc91d 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69137d8fd9f81f7c0f229ac5.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69137d8fd9f81f7c0f229ac5.md
@@ -76,7 +76,7 @@ This is another common name, but not the one mentioned by the speaker.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 2.4,
       "finishTimestamp": 3.49
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69138238171e75857016b2fe.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69138238171e75857016b2fe.md
index 894290560f9..6eadcb23f4d 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69138238171e75857016b2fe.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69138238171e75857016b2fe.md
@@ -68,7 +68,7 @@ This verb is used when talking about profession or identity.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 3.73,
       "finishTimestamp": 5.48
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6913abe637aaab0eb8926231.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6913abe637aaab0eb8926231.md
index 3bcd3433469..388548395e1 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6913abe637aaab0eb8926231.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6913abe637aaab0eb8926231.md
@@ -55,7 +55,7 @@ So, `Tengo` veintiocho `años` means the person is 28 years old.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 6.87,
       "finishTimestamp": 8.59
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69149bd1d69c4b1ae9a8cf9e.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69149bd1d69c4b1ae9a8cf9e.md
index 0d5a0bd0830..1aabf729681 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69149bd1d69c4b1ae9a8cf9e.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/69149bd1d69c4b1ae9a8cf9e.md
@@ -64,7 +64,7 @@ Words, like `canadiense` ("Canadian") or `estudiante` ("student"), are **neutral
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 5.63,
       "finishTimestamp": 6.61
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6914af61cb72593f7ad505cf.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6914af61cb72593f7ad505cf.md
index 6b7d21d40c9..7a2ddab3dd4 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6914af61cb72593f7ad505cf.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6914af61cb72593f7ad505cf.md
@@ -83,7 +83,7 @@ It's a friendly and common way to say goodbye when you expect to see the person
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 8.79,
       "finishTimestamp": 10.57
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6914b05e76110e437ed28598.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6914b05e76110e437ed28598.md
index e0855c2dae4..577ac112219 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6914b05e76110e437ed28598.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-luna/6914b05e76110e437ed28598.md
@@ -56,7 +56,7 @@ This is a general way to say "goodbye" in Spanish, used in both formal and infor
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 8.79,
       "finishTimestamp": 10.57
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/68dc74a6f1c8c46cfd4af3f4.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/68dc74a6f1c8c46cfd4af3f4.md
index 22bb6236526..0a661d3ecd2 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/68dc74a6f1c8c46cfd4af3f4.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/68dc74a6f1c8c46cfd4af3f4.md
@@ -88,7 +88,7 @@ It literally means **“Good afternoon”** or **“Good evening”**, depending
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.2.mp3",
+      "filename": "ES_A1_spanish_meet_mateo.mp3",
       "startTime": 1,
       "startTimestamp": 0.45,
       "finishTimestamp": 2.11
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d068b5495af23a7df214.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d068b5495af23a7df214.md
index b55626977cd..960f789d14d 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d068b5495af23a7df214.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d068b5495af23a7df214.md
@@ -84,7 +84,7 @@ Use `soy` when describing who you are or what you do. For example:
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.2.mp3",
+      "filename": "ES_A1_spanish_meet_mateo.mp3",
       "startTime": 1,
       "startTimestamp": 3.85,
       "finishTimestamp": 5.39
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d3c4ccae5fffec5f3cbc.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d3c4ccae5fffec5f3cbc.md
index ef36eb18a26..cddf893d522 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d3c4ccae5fffec5f3cbc.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d3c4ccae5fffec5f3cbc.md
@@ -83,7 +83,7 @@ This refers to a woman from Colombia, and the ending `-a` indicates the feminine
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.2.mp3",
+      "filename": "ES_A1_spanish_meet_mateo.mp3",
       "startTime": 1,
       "startTimestamp": 5.81,
       "finishTimestamp": 7.13
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d8144e306313835959e6.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d8144e306313835959e6.md
index a50840e1e20..d1edf9e64c5 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d8144e306313835959e6.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6903d8144e306313835959e6.md
@@ -93,7 +93,7 @@ As a reminder, the letter `ñ` in `años` has a tilde (`˜`), giving it a distin
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.2.mp3",
+      "filename": "ES_A1_spanish_meet_mateo.mp3",
       "startTime": 1,
       "startTimestamp": 7.65,
       "finishTimestamp": 9.27
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6914d94cee63aa7cbcafab2c.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6914d94cee63aa7cbcafab2c.md
index a38778a4266..436a436d171 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6914d94cee63aa7cbcafab2c.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/6914d94cee63aa7cbcafab2c.md
@@ -65,7 +65,7 @@ This verb form comes from `ser` and is used to describe who you are or what you
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.2.mp3",
+      "filename": "ES_A1_spanish_meet_mateo.mp3",
       "startTime": 1,
       "startTimestamp": 2.35,
       "finishTimestamp": 5.39
diff --git a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/691629d2fd3b84528356dfcb.md b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/691629d2fd3b84528356dfcb.md
index c3918049a66..c219204d66c 100644
--- a/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/691629d2fd3b84528356dfcb.md
+++ b/curriculum/challenges/english/blocks/es-a1-learn-meet-mateo/691629d2fd3b84528356dfcb.md
@@ -52,7 +52,7 @@ Think about which farewell means "See you soon", often used when you expect to s
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.2.mp3",
+      "filename": "ES_A1_spanish_meet_mateo.mp3",
       "startTime": 1,
       "startTimestamp": 9.69,
       "finishTimestamp": 11.62
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/69108ccea9363f23b3aacb49.md b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/69108ccea9363f23b3aacb49.md
index ae108c5fa42..3841cd69173 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/69108ccea9363f23b3aacb49.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/69108ccea9363f23b3aacb49.md
@@ -118,7 +118,7 @@ In Spanish, most professions change based on gender. However, some professions t
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.2.mp3",
+      "filename": "ES_A1_spanish_meet_camila_and_mateo.mp3",
       "startTime": 1,
       "startTimestamp": 20.58,
       "finishTimestamp": 28.69
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691090f4e43e61297523d064.md b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691090f4e43e61297523d064.md
index 4597b90bde9..57fcf4b3295 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691090f4e43e61297523d064.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691090f4e43e61297523d064.md
@@ -93,7 +93,7 @@ This dialogue between Mateo and Camila focuses on age.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.2.mp3",
+      "filename": "ES_A1_spanish_meet_camila_and_mateo.mp3",
       "startTime": 1,
       "startTimestamp": 28.95,
       "finishTimestamp": 35.9
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691606a74e875776d0c00634.md b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691606a74e875776d0c00634.md
index df91e32776d..7d7863206e0 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691606a74e875776d0c00634.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691606a74e875776d0c00634.md
@@ -83,7 +83,7 @@ This dialogue has the words `llamas`, `llaman`, and `llamo`. Three variations of
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 0.76,
       "finishTimestamp": 10.84
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691610efdd1f677c74eae91a.md b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691610efdd1f677c74eae91a.md
index 9ab7767d506..2c625b08c16 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691610efdd1f677c74eae91a.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691610efdd1f677c74eae91a.md
@@ -79,7 +79,7 @@ This dialogue includes the words `gusto`, `El Salvador`, and `guatemalteco` (in
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 12.5,
       "finishTimestamp": 24.61
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691613b96a5856810fdcd106.md b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691613b96a5856810fdcd106.md
index 92806a3dc1a..e1e7bdabf9b 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691613b96a5856810fdcd106.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691613b96a5856810fdcd106.md
@@ -83,7 +83,7 @@ This dialogue includes the words `años`, `veintiún`, and `treinta y cinco`.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 25.92,
       "finishTimestamp": 33.68
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691615c732e6878518963786.md b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691615c732e6878518963786.md
index 21ae63594af..e9b79aef5b5 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691615c732e6878518963786.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/691615c732e6878518963786.md
@@ -83,7 +83,7 @@ This dialogue includes the words `dedicas`, `representante`, and `analista`.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 35.51,
       "finishTimestamp": 44.25
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/6916172fb15c2b88c574ac88.md b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/6916172fb15c2b88c574ac88.md
index 631169b2d25..af6292361b4 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-first-questions/6916172fb15c2b88c574ac88.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-first-questions/6916172fb15c2b88c574ac88.md
@@ -72,7 +72,7 @@ This dialogue includes the words `encantada` and `igualmente`.
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 45.14,
       "finishTimestamp": 49.51
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c850c5eb642cc96ed86544.md b/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c850c5eb642cc96ed86544.md
index 2df4bf3441a..ce4722a68fe 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c850c5eb642cc96ed86544.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c850c5eb642cc96ed86544.md
@@ -83,7 +83,7 @@ It's the most common way to introduce your name in a conversation. For example:
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 0.35,
       "finishTimestamp": 7.56
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c9881715d314368f261622.md b/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c9881715d314368f261622.md
index 349d36a7f72..62c5ed4d95a 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c9881715d314368f261622.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c9881715d314368f261622.md
@@ -77,7 +77,7 @@ Camila does mention the time of the day.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 0.3,
       "finishTimestamp": 7.15
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c98887b9a4783bf6788700.md b/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c98887b9a4783bf6788700.md
index ae9595c791f..e5d75764f22 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c98887b9a4783bf6788700.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-greetings-and-farewells/68c98887b9a4783bf6788700.md
@@ -63,7 +63,7 @@ When someone says this, it usually means they plan or expect to see you the next
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 0.2,
       "finishTimestamp": 7.11
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/68dc7500da504f7042474b20.md b/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/68dc7500da504f7042474b20.md
index cebe924f941..c3f14616ed8 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/68dc7500da504f7042474b20.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/68dc7500da504f7042474b20.md
@@ -82,7 +82,7 @@ This is a general greeting, but Mateo uses a more specific one for nighttime.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.4.mp3",
+      "filename": "ES_A1_spanish_meet_mateo_practice.mp3",
       "startTime": 1,
       "startTimestamp": 0.31,
       "finishTimestamp": 8.88
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/691b4fcd528ad6fa5c9d92d8.md b/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/691b4fcd528ad6fa5c9d92d8.md
index 5858a11af4c..649da0f594b 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/691b4fcd528ad6fa5c9d92d8.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/691b4fcd528ad6fa5c9d92d8.md
@@ -78,7 +78,7 @@ Other valid options are `Soy Mateo` and `Mi nombre es Mateo`, but Mateo uses the
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.4.mp3",
+      "filename": "ES_A1_spanish_meet_mateo_practice.mp3",
       "startTime": 1,
       "startTimestamp": 0.31,
       "finishTimestamp": 8.88
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/691df74516743f1713c969df.md b/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/691df74516743f1713c969df.md
index 62f12f0cb3e..3dd675e0369 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/691df74516743f1713c969df.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/691df74516743f1713c969df.md
@@ -73,7 +73,7 @@ The phrase `Soy chilena` also uses `ser` to indicate origin or nationality, and
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.1.mp3",
+      "filename": "ES_A1_spanish_meet_luna.mp3",
       "startTime": 1,
       "startTimestamp": 0.39,
       "finishTimestamp": 10.57
diff --git a/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/69389800ad6b2ca59892ca90.md b/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/69389800ad6b2ca59892ca90.md
index 3026369e9ba..249ffc60447 100644
--- a/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/69389800ad6b2ca59892ca90.md
+++ b/curriculum/challenges/english/blocks/es-a1-practice-introducing-yourself/69389800ad6b2ca59892ca90.md
@@ -73,7 +73,7 @@ The phrase `Hasta mañana` is a common way to say that she plans to see you tomo
       }
     ],
     "audio": {
-      "filename": "ES_A1_2.3.mp3",
+      "filename": "ES_A1_spanish_meet_julieta.mp3",
       "startTime": 1,
       "startTimestamp": 0.61,
       "finishTimestamp": 11.25
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-first-questions-basics/68dc7578ad62ca74e21c23e0.md b/curriculum/challenges/english/blocks/es-a1-warm-up-first-questions-basics/68dc7578ad62ca74e21c23e0.md
index cdea372d3a3..5699c81546c 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-first-questions-basics/68dc7578ad62ca74e21c23e0.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-first-questions-basics/68dc7578ad62ca74e21c23e0.md
@@ -78,7 +78,7 @@ This is the most common way to introduce yourself in Spanish, using the verb `ll
       }
     ],
     "audio": {
-      "filename": "ES_A1_3.1.mp3",
+      "filename": "ES_A1_spanish_meet_angela_and_basti.mp3",
       "startTime": 1,
       "startTimestamp": 9.58,
       "finishTimestamp": 10.84
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68bb001c22f3bcbd1fdf38fa.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68bb001c22f3bcbd1fdf38fa.md
index f02cfcb88e1..4c08244b31d 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68bb001c22f3bcbd1fdf38fa.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68bb001c22f3bcbd1fdf38fa.md
@@ -79,7 +79,7 @@ The word `Hola` is a greeting. It's used when you meet someone, similar to "Hell
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 0.35,
       "finishTimestamp": 0.90
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c582b401546d5359f54658.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c582b401546d5359f54658.md
index 726686caba7..d4c57b5b913 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c582b401546d5359f54658.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c582b401546d5359f54658.md
@@ -77,7 +77,7 @@ This means "Good night", and it's used at the end of the day.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 1.0,
       "finishTimestamp": 2.18
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c586973237a2ae8b8a9dcb.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c586973237a2ae8b8a9dcb.md
index 231f0c25d18..1ca96175c60 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c586973237a2ae8b8a9dcb.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c586973237a2ae8b8a9dcb.md
@@ -77,7 +77,7 @@ This is a more specific morning greeting, not the phrase used in the audio.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 1.0,
       "finishTimestamp": 2.13
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c5877f0c90f5b8cad8e2dd.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c5877f0c90f5b8cad8e2dd.md
index e3cbb9107ff..5cbc0dd88bf 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c5877f0c90f5b8cad8e2dd.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c5877f0c90f5b8cad8e2dd.md
@@ -80,7 +80,7 @@ You can use `Buenas noches` both when greeting someone in the evening **and** wh
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 0.8,
       "finishTimestamp": 1.8
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c5893734d89dcb8e5b7a34.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c5893734d89dcb8e5b7a34.md
index cbc185292fa..bb3e5649888 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c5893734d89dcb8e5b7a34.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c5893734d89dcb8e5b7a34.md
@@ -79,7 +79,7 @@ You can use `Adiós` in both formal and informal situations, usually when you do
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 6.81,
       "finishTimestamp": 7.56
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58a750c57dadd0f6a3f3b.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58a750c57dadd0f6a3f3b.md
index 286e336657f..78baab1ceb0 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58a750c57dadd0f6a3f3b.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58a750c57dadd0f6a3f3b.md
@@ -83,7 +83,7 @@ This means "Good morning", and it's not used to say goodbye.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 6.57,
       "finishTimestamp": 7.11
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58aa8c9d2a2dfea45deb7.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58aa8c9d2a2dfea45deb7.md
index 1d39795b292..778e9fd47b4 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58aa8c9d2a2dfea45deb7.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58aa8c9d2a2dfea45deb7.md
@@ -79,7 +79,7 @@ It's used when you expect to see the person again, but not necessarily soon. For
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 5.68,
       "finishTimestamp": 6.64
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58ac706597fe1f643837d.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58ac706597fe1f643837d.md
index 00b0e7c64c9..9ed9b15908d 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58ac706597fe1f643837d.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58ac706597fe1f643837d.md
@@ -79,7 +79,7 @@ It's similar to `Hasta luego` ("See you later"), but `hasta pronto` suggests a s
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 6.16,
       "finishTimestamp": 7.15
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b01490a81e467b6f8d8.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b01490a81e467b6f8d8.md
index d1b30e9d7a4..06e8c335340 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b01490a81e467b6f8d8.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b01490a81e467b6f8d8.md
@@ -77,7 +77,7 @@ This is a general goodbye, not the phrase used in the audio.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 5.35,
       "finishTimestamp": 6.22
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b24ac7964e7776fea16.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b24ac7964e7776fea16.md
index 8fc0499650c..1b6b11cdbbe 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b24ac7964e7776fea16.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b24ac7964e7776fea16.md
@@ -76,7 +76,7 @@ This means "programmer", which is similar but not the exact word used.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.3.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_evening.mp3",
       "startTime": 1,
       "startTimestamp": 3.90,
       "finishTimestamp": 4.97
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b51686f9aea14946c1c.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b51686f9aea14946c1c.md
index 22e61a7b191..66bead8baf8 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b51686f9aea14946c1c.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b51686f9aea14946c1c.md
@@ -76,7 +76,7 @@ This means "developer", not designer.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.1.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_morning.mp3",
       "startTime": 1,
       "startTimestamp": 4.38,
       "finishTimestamp": 5.42
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b85c5a2e0ed307f24d4.md b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b85c5a2e0ed307f24d4.md
index 58c2dcc2252..81c37ede3fc 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b85c5a2e0ed307f24d4.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-greetings-and-farewells-basics/68c58b85c5a2e0ed307f24d4.md
@@ -77,7 +77,7 @@ This means "designer", not the word you hear.
       }
     ],
     "audio": {
-      "filename": "ES_A1_1.2.mp3",
+      "filename": "ES_A1_spanish_greetings_in_the_afternoon.mp3",
       "startTime": 1,
       "startTimestamp": 4.07,
       "finishTimestamp": 4.81
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68deada768199f7410bda165.md b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68deada768199f7410bda165.md
index dc9f21ac77b..e41d47f9045 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68deada768199f7410bda165.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68deada768199f7410bda165.md
@@ -93,7 +93,7 @@ In Spanish, many professions change their ending depending on whether the speake
       }
     ],
     "audio": {
-      "filename": "ES_A1_2_vocabulary.mp3",
+      "filename": "ES_A1_spanish_introducing_yourself_vocabulary.mp3",
       "startTime": 1,
       "startTimestamp": 1.5,
       "finishTimestamp": 3.87
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68dec33d726ba397789a62ec.md b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68dec33d726ba397789a62ec.md
index a5b68f639b3..8168f9be209 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68dec33d726ba397789a62ec.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68dec33d726ba397789a62ec.md
@@ -77,7 +77,7 @@ Mateo did not mention a male architect.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2_vocabulary.mp3",
+      "filename": "ES_A1_spanish_introducing_yourself_vocabulary.mp3",
       "startTime": 1,
       "startTimestamp": 5.57,
       "finishTimestamp": 7.73
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68dec93b79d995a4449c63a4.md b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68dec93b79d995a4449c63a4.md
index 546a4b10c4a..59fa65ec6c9 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68dec93b79d995a4449c63a4.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68dec93b79d995a4449c63a4.md
@@ -80,7 +80,7 @@ This is a male or female police officer, which is not what Mateo said.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2_vocabulary.mp3",
+      "filename": "ES_A1_spanish_introducing_yourself_vocabulary.mp3",
       "startTime": 1,
       "startTimestamp": 9.94,
       "finishTimestamp": 12.3
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df28fd4c9350f60d677e77.md b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df28fd4c9350f60d677e77.md
index 85d0f1a56bd..866996cdd55 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df28fd4c9350f60d677e77.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df28fd4c9350f60d677e77.md
@@ -91,7 +91,7 @@ This refers to a man from Colombia.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2_vocabulary.mp3",
+      "filename": "ES_A1_spanish_introducing_yourself_vocabulary.mp3",
       "startTime": 1,
       "startTimestamp": 20.48,
       "finishTimestamp": 21.6
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df2d0bfdc47c0438a86747.md b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df2d0bfdc47c0438a86747.md
index e2b0e804e25..70065ca57bc 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df2d0bfdc47c0438a86747.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df2d0bfdc47c0438a86747.md
@@ -76,7 +76,7 @@ This refers to a man from Colombia.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2_vocabulary.mp3",
+      "filename": "ES_A1_spanish_introducing_yourself_vocabulary.mp3",
       "startTime": 1,
       "startTimestamp": 16.99,
       "finishTimestamp": 18.57
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df2eb089231308d5addb91.md b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df2eb089231308d5addb91.md
index 43ba2f335d5..34497ab465d 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df2eb089231308d5addb91.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68df2eb089231308d5addb91.md
@@ -72,7 +72,7 @@ This refers to a woman from Brazil.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2_vocabulary.mp3",
+      "filename": "ES_A1_spanish_introducing_yourself_vocabulary.mp3",
       "startTime": 1,
       "startTimestamp": 14.16,
       "finishTimestamp": 15.23
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e53795c299ac48cf6e12f9.md b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e53795c299ac48cf6e12f9.md
index 0cbbf55d578..b65a92e4620 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e53795c299ac48cf6e12f9.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e53795c299ac48cf6e12f9.md
@@ -88,7 +88,7 @@ Notice the special character `ñ` in `años`.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2_vocabulary.mp3",
+      "filename": "ES_A1_spanish_introducing_yourself_vocabulary.mp3",
       "startTime": 1,
       "startTimestamp": 23.60,
       "finishTimestamp": 25.69
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e53e2526414c56ac61f4e5.md b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e53e2526414c56ac61f4e5.md
index 8d1a7b92ca0..355bcadf05f 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e53e2526414c56ac61f4e5.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e53e2526414c56ac61f4e5.md
@@ -82,7 +82,7 @@ This means "twenty two years old". The number Mateo says is higher.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2_vocabulary.mp3",
+      "filename": "ES_A1_spanish_introducing_yourself_vocabulary.mp3",
       "startTime": 1,
       "startTimestamp": 27.2,
       "finishTimestamp": 29.6
diff --git a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e54b639461636cb65a87ee.md b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e54b639461636cb65a87ee.md
index f23c598cbf7..dcfde8449ec 100644
--- a/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e54b639461636cb65a87ee.md
+++ b/curriculum/challenges/english/blocks/es-a1-warm-up-introducing-yourself-basics/68e54b639461636cb65a87ee.md
@@ -84,7 +84,7 @@ The number he says is lower than thirty-eight.
       }
     ],
     "audio": {
-      "filename": "ES_A1_2_vocabulary.mp3",
+      "filename": "ES_A1_spanish_introducing_yourself_vocabulary.mp3",
       "startTime": 1,
       "startTimestamp": 30.87,
       "finishTimestamp": 33.6
diff --git a/curriculum/schema/scene-assets.js b/curriculum/schema/scene-assets.js
index 3c0971eacea..6b6d2c3c220 100644
--- a/curriculum/schema/scene-assets.js
+++ b/curriculum/schema/scene-assets.js
@@ -270,17 +270,17 @@ const availableAudios = [
   'B1_24-1.mp3',
   'B1_24-2.mp3',
   'B1_24-3.mp3',
-  'ES_A1_1.1.mp3',
-  'ES_A1_1.2.mp3',
-  'ES_A1_1.3.mp3',
-  'ES_A1_1.4.mp3',
-  'ES_A1_2.1.mp3',
-  'ES_A1_2.2.mp3',
-  'ES_A1_2.3.mp3',
-  'ES_A1_2.4.mp3',
-  'ES_A1_2_vocabulary.mp3',
-  'ES_A1_3.1.mp3',
-  'ES_A1_3.2.mp3',
+  'ES_A1_spanish_greetings_in_the_morning.mp3',
+  'ES_A1_spanish_greetings_in_the_afternoon.mp3',
+  'ES_A1_spanish_greetings_in_the_evening.mp3',
+  'ES_A1_spanish_greetings_camila_practice.mp3',
+  'ES_A1_spanish_meet_luna.mp3',
+  'ES_A1_spanish_meet_mateo.mp3',
+  'ES_A1_spanish_meet_julieta.mp3',
+  'ES_A1_spanish_meet_mateo_practice.mp3',
+  'ES_A1_spanish_introducing_yourself_vocabulary.mp3',
+  'ES_A1_spanish_meet_angela_and_basti.mp3',
+  'ES_A1_spanish_meet_camila_and_mateo.mp3',
   `ES_A1_first_questions_numbers.mp3`,
   'ES_A1_first_questions_warmup.mp3',
   'ES_A1_alphabet.mp3',