diff --git a/tools/challenge-helper-scripts/create-language-block.ts b/tools/challenge-helper-scripts/create-language-block.ts
index 7d2f4517bc5..b11159a3f1c 100644
--- a/tools/challenge-helper-scripts/create-language-block.ts
+++ b/tools/challenge-helper-scripts/create-language-block.ts
@@ -7,7 +7,8 @@ import { ObjectId } from 'bson';
 import {
   SuperBlocks,
   languageSuperBlocks,
-  chapterBasedSuperBlocks
+  chapterBasedSuperBlocks,
+  type ChallengeLang
 } from '@freecodecamp/shared/config/curriculum';
 
 import { BlockLayouts, BlockLabel } from '@freecodecamp/shared/config/blocks';
@@ -95,7 +96,7 @@ async function createLanguageBlock(
     moduleTitle
   });
 
-  const challengeLang = getLangFromSuperBlock(superBlock);
+  const challengeLang: ChallengeLang = getLangFromSuperBlock(superBlock);
   const challengeId: ObjectId = new ObjectId();
 
   await createMetaJson(
@@ -241,7 +242,7 @@ async function createMetaJson(
 async function createDialogueChallenge(
   challengeId: ObjectId,
   block: string,
-  challengeLang: string
+  challengeLang: ChallengeLang
 ): Promise<ObjectId> {
   const { blockContentDir } = getContentConfig('english') as {
     blockContentDir: string;
@@ -262,7 +263,7 @@ async function createQuizChallenge(
   block: string,
   title: string,
   questionCount: number,
-  challengeLang: string
+  challengeLang: ChallengeLang
 ): Promise<ObjectId> {
   return createQuizFile({
     challengeId,
diff --git a/tools/challenge-helper-scripts/create-next-task.ts b/tools/challenge-helper-scripts/create-next-task.ts
index 2a54df553ea..f63701f29c6 100644
--- a/tools/challenge-helper-scripts/create-next-task.ts
+++ b/tools/challenge-helper-scripts/create-next-task.ts
@@ -17,7 +17,10 @@ const createNextTask = async () => {
 
   const prevChallengeId =
     meta.challengeOrder[meta.challengeOrder.length - 1]?.id;
-  const challengeLang = prevChallengeId && getChallenge(prevChallengeId)?.lang;
+
+  const challengeLang = prevChallengeId
+    ? getChallenge(prevChallengeId)?.lang
+    : undefined;
 
   const inputType = await getInputType(challengeType, challengeLang);
 
diff --git a/tools/challenge-helper-scripts/helpers/get-challenge-template.ts b/tools/challenge-helper-scripts/helpers/get-challenge-template.ts
index 6b359615d59..b77f04c9078 100644
--- a/tools/challenge-helper-scripts/helpers/get-challenge-template.ts
+++ b/tools/challenge-helper-scripts/helpers/get-challenge-template.ts
@@ -1,4 +1,5 @@
 import { ObjectId } from 'bson';
+import type { ChallengeLang } from '@freecodecamp/shared/config/curriculum';
 
 const sanitizeTitle = (title: string) => {
   return title.includes(':') || title.includes("'") ? `"${title}"` : title;
@@ -10,7 +11,7 @@ interface ChallengeOptions {
   dashedName: string;
   challengeType: string;
   questionCount?: number;
-  challengeLang?: string;
+  challengeLang?: ChallengeLang;
   inputType?: string;
 }
 
diff --git a/tools/challenge-helper-scripts/helpers/get-input-type.ts b/tools/challenge-helper-scripts/helpers/get-input-type.ts
index c95f8f20aad..eeed18f355a 100644
--- a/tools/challenge-helper-scripts/helpers/get-input-type.ts
+++ b/tools/challenge-helper-scripts/helpers/get-input-type.ts
@@ -4,7 +4,7 @@ import { challengeTypes } from '@freecodecamp/shared/config/challenge-types';
 
 export const getInputType = async (
   challengeType: string,
-  challengeLang?: string
+  challengeLang?: ChallengeLang
 ): Promise<string | undefined> => {
   const isRequired =
     parseInt(challengeType) === challengeTypes.fillInTheBlank &&
diff --git a/tools/challenge-helper-scripts/helpers/get-step-template.test.ts b/tools/challenge-helper-scripts/helpers/get-step-template.test.ts
index 8bc62dab1f5..2e70ad5889a 100644
--- a/tools/challenge-helper-scripts/helpers/get-step-template.test.ts
+++ b/tools/challenge-helper-scripts/helpers/get-step-template.test.ts
@@ -1,6 +1,7 @@
 import { describe, it, expect } from 'vitest';
 import { ObjectId } from 'bson';
 import { getStepTemplate } from './get-step-template.js';
+import { ChallengeLang } from '@freecodecamp/shared/config/curriculum';
 
 const props = {
   challengeId: new ObjectId('60d4ebe4801158d1abe1b18f'),
@@ -65,8 +66,11 @@ dashedName: step-5
 lang: es
 ---`;
 
-    expect(getStepTemplate({ ...props, challengeLang: 'es' })).match(
-      new RegExp(`^${frontMatter}`)
-    );
+    expect(
+      getStepTemplate({
+        ...props,
+        challengeLang: ChallengeLang.Spanish
+      })
+    ).match(new RegExp(`^${frontMatter}`));
   });
 });
diff --git a/tools/challenge-helper-scripts/helpers/get-step-template.ts b/tools/challenge-helper-scripts/helpers/get-step-template.ts
index 86c8849e435..2304335b795 100644
--- a/tools/challenge-helper-scripts/helpers/get-step-template.ts
+++ b/tools/challenge-helper-scripts/helpers/get-step-template.ts
@@ -1,4 +1,5 @@
 import { ObjectId } from 'bson';
+import type { ChallengeLang } from '@freecodecamp/shared/config/curriculum';
 import { insertErms } from './insert-erms.js';
 
 // Builds a block
@@ -25,7 +26,7 @@ type StepOptions = {
   stepNum: number;
   challengeType?: number;
   isFirstChallenge?: boolean;
-  challengeLang?: string;
+  challengeLang?: ChallengeLang;
 };
 
 export interface ChallengeSeed {
diff --git a/tools/challenge-helper-scripts/utils.ts b/tools/challenge-helper-scripts/utils.ts
index c8248efa8d9..f06dd1f6f35 100644
--- a/tools/challenge-helper-scripts/utils.ts
+++ b/tools/challenge-helper-scripts/utils.ts
@@ -5,6 +5,7 @@ import matter from 'gray-matter';
 import { uniq } from 'lodash';
 
 import { challengeTypes } from '@freecodecamp/shared/config/challenge-types';
+import type { ChallengeLang } from '@freecodecamp/shared/config/curriculum';
 import { parseCurriculumStructure } from '@freecodecamp/curriculum/build-curriculum';
 import { parseMDSync } from '../challenge-parser/parser/index.js';
 import { getMetaData, updateMetaData } from './helpers/project-metadata.js';
@@ -23,7 +24,7 @@ interface Options {
   projectPath?: string;
   challengeSeeds?: ChallengeSeed[];
   isFirstChallenge?: boolean;
-  challengeLang?: string;
+  challengeLang?: ChallengeLang;
 }
 
 interface QuizOptions {
@@ -32,7 +33,7 @@ interface QuizOptions {
   title: string;
   dashedName: string;
   questionCount: number;
-  challengeLang?: string;
+  challengeLang?: ChallengeLang;
 }
 
 export async function getAllBlocks() {
@@ -108,7 +109,7 @@ const createDialogueFile = ({
 }: {
   challengeId: ObjectId;
   projectPath: string;
-  challengeLang: string;
+  challengeLang: ChallengeLang;
 }): ObjectId => {
   const challengeType = challengeTypes.dialogue.toString();
   const template = getTemplate(challengeType);
@@ -274,7 +275,7 @@ const updateTaskMarkdownFiles = (): void => {
 type Challenge = {
   challengeType: number;
   challengeFiles: ChallengeSeed[];
-  lang?: string;
+  lang?: ChallengeLang;
 };
 
 const getChallenge = (challengeId: string): Challenge => {