Duolingo Clone
Interactive platform for language learning with lessons, quizzes, and progress tracking.
#Lingo - Interactive platform for language learning.
#:notebook_with_decorative_cover: Table of Contents
#:bangbang: Folder Structure
Here is the folder structure of this app.
duolingo-clone/ |- actions/ |-- challenge-progress.ts |-- user-progress.ts |-- user-subscription.ts |- app/ |-- (auth)/ |-- (main)/ |-- (marketing)/ |-- admin/ |-- api/ |-- lesson/ |-- apple-icon.png |-- favicon.ico |-- globals.css |-- icon1.png |-- icon2.png |-- layout.tsx |- components/ |-- modals/ |-- ui/ |-- banner.tsx |-- feed-wrapper.tsx |-- mobile-header.tsx |-- mobile-sidebar.tsx |-- promo.tsx |-- quests.tsx |-- sidebar-item.tsx |-- sidebar.tsx |-- sticky-wrapper.tsx |-- user-progress.tsx |- config/ |-- index.ts |- db/ |-- drizzle.ts |-- queries.ts |-- schema.ts |- lib/ |-- admin.ts |-- stripe.ts |-- utils.ts |- public/ |- scripts/ |-- prod.ts |- store/ |-- use-exit-modal.ts |-- use-hearts-modal.ts |-- use-practice-modal.ts |- .env.example |- .env/.env.local |- .gitignore |- .prettierrc.json |- components.json |- constants.ts |- drizzle.config.ts |- environment.d.ts |- eslint.config.mjs |- next.config.ts |- package.json |- pnpm-lock.yaml |- pnpm-workspace.yaml |- postcss.config.js |- proxy.ts |- tailwind.config.ts |- tsconfig.json |- vercel.ts
#:toolbox: Getting Started
- Make sure Git and NodeJS is installed.
- Clone this repository to your local computer.
- Create
.envfile in root directory. - Contents of
.env:
# .env # disabled next.js telemetry NEXT_TELEMETRY_DISABLED=1 # clerk auth keys NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY=pk_test_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX CLERK_SECRET_KEY=sk_test_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX # neon db uri DATABASE_URL="postgresql://<user>:<password>@<host>:<post>/lingo?sslmode=require" # stripe api key and webhook STRIPE_API_SECRET_KEY=sk_test_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX STRIPE_WEBHOOK_SECRET=whsec_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX # public app url NEXT_PUBLIC_APP_URL=http://localhost:3000 # clerk admin user id(s) separated by comma (,) CLERK_ADMIN_IDS="user_xxxxxxxxxxxxxxxxxxxxxxxxxxxxx" # or CLERK_ADMIN_IDS="user_xxxxxxxxxxxxxxxxxxxxxxxxxxxxx, user_xxxxxxxxxxxxxxxxxxxxxx" for multiple admins.
-
Obtain Clerk Authentication Keys
- Source: Clerk Dashboard or Settings Page
- Procedure:
- Log in to your Clerk account.
- Navigate to the dashboard or settings page.
- Look for the section related to authentication keys.
- Copy the
NEXT_PUBLIC_CLERK_PUBLISHABLE_KEYandCLERK_SECRET_KEYprovided in that section.
-
Retrieve Neon Database URI
- Source: Database Provider (e.g., Neon, PostgreSQL)
- Procedure:
- Access your database provider's platform or configuration.
- Locate the database connection details.
- Replace
<user>,<password>,<host>, and<port>placeholders in the URI with your actual database credentials. - Ensure to include
?sslmode=requireat the end of the URI for SSL mode requirement.
-
Fetch Stripe API Key and Webhook Secret
- Source: Stripe Dashboard
- Procedure:
- Log in to your Stripe account.
- Navigate to the dashboard or API settings.
- Find the section related to API keys and webhook secrets.
- Copy the
STRIPE_API_SECRET_KEYandSTRIPE_WEBHOOK_SECRET.
-
Specify Public App URL
- Procedure:
- Replace
http://localhost:3000with the URL of your deployed application.
- Replace
- Procedure:
-
Identify Clerk Admin User IDs
- Source: Clerk Dashboard or Settings Page
- Procedure:
- Log in to your Clerk account.
- Navigate to the dashboard or settings page.
- Find the section related to admin user IDs.
- Copy the user IDs provided, ensuring they are separated by commas and spaces.
-
Save and Secure:
- Save the changes to the
.envfile.
- Save the changes to the
-
Install Project Dependencies using
pnpm install. -
Run the Seed Script:
In the same terminal, run the following command to execute the seed script:
pnpm run db:push && pnpm run db:prod
This command uses tsx to execute the Typescript file (scripts/prod.ts) and writes challenges data in database.
- Verify Data in Database:
Once the script completes, check your database to ensure that the challenges data has been successfully seeded.
- Now app is fully configured 👍 and you can start using this app using either one of
pnpm dev.
NOTE: Please make sure to keep your API keys and configuration values secure and do not expose them publicly.
#:raising_hand: Need Help?
If you run into issues during installation or setup:
- GitHub Discussions — Open a Q&A discussion for setup and troubleshooting help.
- Email — sanidhyyy@gmail.com
- Discord —
@sanidhyy
#:camera: Screenshots
#:gear: Tech Stack
#:wrench: Stats
#:raised_hands: Contribute
You might encounter some bugs while using this app. You are more than welcome to contribute. Just submit changes via pull request and I will review them before merging. Make sure you follow community guidelines.
#:gem: Acknowledgements
Useful resources and dependencies that are used in Lingo.
- Special Thanks to Code with Antonio: https://codewithantonio.com/
- Kenney Assets: https://kenney.nl/
- Freesound: https://freesound.org/
- Elevenlabs AI: https://elevenlabs.io/
- Flagpack: https://flagpack.xyz/
- @clerk/nextjs: ^7.8.0
- @neondatabase/serverless: ^1.1.0
- @radix-ui/react-avatar: ^1.2.6
- @radix-ui/react-dialog: ^1.1.23
- @radix-ui/react-progress: ^1.1.16
- @radix-ui/react-separator: ^1.1.15
- @radix-ui/react-slot: ^1.3.3
- @types/node: ^26.2.0
- @types/react: ^19.3.0
- @types/react-dom: ^19.2.7
- @vercel/config: ^0.7.0
- autoprefixer: ^10.5.5
- class-variance-authority: ^0.7.1
- clsx: ^2.1.0
- dotenv: ^17.4.2
- drizzle-kit: ^0.31.10
- drizzle-orm: ^0.45.2
- eslint: ^9
- eslint-config-next: 16.3.5
- eslint-config-prettier: ^10.1.8
- lucide-react: ^1.41.0
- next: ^16.3.4
- pg: ^8.23.0
- postcss: ^8
- prettier: ^3.9.6
- prettier-plugin-tailwindcss: ^0.8.0
- ra-data-simple-rest: ^5.15.3
- react: ^19.3.0
- react-admin: ^5.15.1
- react-circular-progressbar: ^2.2.0
- react-confetti: ^6.4.0
- react-dom: ^19.2.8
- react-use: ^17.6.1
- sonner: ^2.0.8
- stripe: ^22.6.2
- tailwind-merge: ^3.7.0
- tailwindcss: ^3.4.19
- tailwindcss-animate: ^1.0.7
- tsx: ^4.23.13
- typescript: ^6
- zustand: ^5.0.15
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#:books: Learn More
To learn more about Next.js, take a look at the following resources:
- Next.js Documentation - learn about Next.js features and API.
- Learn Next.js - an interactive Next.js tutorial.
You can check out the Next.js GitHub repository - your feedback and contributions are welcome!
#:page_with_curl: Deploy on Vercel
The easiest way to deploy your Next.js app is to use the Vercel Platform from the creators of Next.js.
Check out Next.js deployment documentation for more details.
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