Open Source Language Learning Tool | Free Alternative to Language Reactor & Duolingo
🌐 Official Website & Documentation: openkoto.com
📢 Note: This project was previously known as TextLingo. We've renamed it to OpenKoto (Open + 言/ことば, meaning "word" in Japanese) to better reflect our vision of open-source reading, translation, and language learning.
OpenKoto Desktop is an open-source, AI-powered language learning application that transforms any content you're interested in into an immersive learning experience. Beyond language learning, it also serves as a powerful reader and translation tool. Unlike traditional language learning apps, OpenKoto lets you learn from real-world content — song lyrics, news articles, blog posts, or any text that sparks your interest.
Built with Tauri + React + Rust, it runs locally on your machine for fast performance and complete privacy.
🎯 Perfect for: Japanese learners, English learners, polyglots, and anyone who wants to learn languages through content they actually enjoy!
| Feature | OpenKoto | Traditional Apps |
|---|---|---|
| 📖 Learn from any content | ✅ Import URLs, docs, lyrics | ❌ Fixed curriculum |
| 🔒 Privacy-focused | ✅ 100% local processing | ❌ Cloud-dependent |
| 🆓 Free & open source | ✅ Apache 2.0 License | ❌ Subscription-based |
| 🌍 100+ languages supported | ✅ Learning & transcription | ❌ Limited languages |
| 🖥️ Native desktop performance | ✅ Tauri + Rust | ❌ Web-based lag |
| 🤖 AI-powered explanations | ✅ Smart context analysis | ❌ Limited feedback |
| Version | Description | Link |
|---|---|---|
| Desktop | Recommended 🖥️ Native performance, local data, Mac/Windows/Linux | Download Latest Release |
| Web | Convenient online access, no installation required | https://openkoto.app |
| Source Code | 🆓 Fully open source, Apache 2.0 License | GitHub Repository |
- 🎯 Smart Support - One-click import from URLs, PDF, EPUB, TXT, Word, Markdown with automatic translation and vocabulary extraction
- 📖 Immersive Reading Mode
- Professional reader interface for articles and books
- Real-time language switching
- Instant word lookup and grammar parsing
- 🔍 AI Learning Assistant
- Intelligent word explanations in context
- Detailed grammar breakdowns (Chinese-Japanese-English)
- Pronunciation guidance and correction
- 📝 Interactive AI Q&A - Highlight and ask questions about any text in real-time
- 📚 Study with Any Material - Import PDFs, EPUB books, or TXT files for deep reading and analysis
- 🎵 Learn Japanese through Song Lyrics - Master pronunciation for your favorite J-Pop songs and concerts
- 📰 Read News in Foreign Languages - The Economist, NHK News, and more with instant translations
- 🎬 Anime Learning - Understand your favorite Japanese anime with transcription support
- 📚 Personalized vocabulary and grammar exercise system
- 🎥 YouTube video learning support
- Node.js (v18+)
- Rust
-
Clone and download binaries (ffmpeg & yt-dlp for video features):
git clone https://github.com/hikariming/OpenKoto.git cd OpenKoto chmod +x script/download_binaries.sh ./script/download_binaries.sh -
Install dependencies:
cd textlingo-desktop npm installOption A: Core Application Only (Faster, no Python plugins)
npm run tauri dev
Option B: Full Application with Plugins (Recommended for PDF translation) This script handles Python environment, dependencies, and plugin setup automatically.
# Make sure you are in the root directory chmod +x dev.sh ./dev.sh
For more details, see Development Documentation.
This is due to macOS Gatekeeper. Run in Terminal:
sudo xattr -r -d com.apple.quarantine /Applications/OpenKoto\ Desktop.app100+ languages supported for learning and transcription, including:
- 🇯🇵 Japanese (with furigana support and auto grammar analysis)
- 🇺🇸 English
- 🇨🇳 Chinese (Simplified & Traditional)
- 🇰🇷 Korean
- 🇫🇷 French
- 🇩🇪 German
- 🇪🇸 Spanish
- 🇮🇹 Italian
- 🇵🇹 Portuguese
- And many more...
PRs welcome for additional language support!
- Frontend: React + TypeScript + Tailwind CSS
- Backend: Tauri + Rust
- AI: OpenAI-compatible API integration
We welcome contributions! Please feel free to submit PRs or open issues.
v0.1.4 (Development)
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openkoto is a platform that enables foreign language learning based on texts that interest you. Instead of traditional language learning materials, it allows you to leverage your personal interests, such as favorite novels, articles, or blogs, as study resources. This unique approach makes language learning more engaging and effective, helping you improve your language proficiency while exploring topics you love.
Apache License 2.0 - See LICENSE for details
⭐ Star this repo if OpenKoto helps you learn languages! ⭐