read-frog: an AI-powered language learning browser extension with context-aware translation and multi-model support

What it solves

Read Frog is a browser extension designed to help language learners master new languages by integrating AI-powered translation and analysis directly into their web browsing experience, reducing the need for external translation tools or human instructors.

How it works

The extension leverages AI models from over 20 providers (via Vercel AI SDK) to provide real-time translation and linguistic explanations. It can operate in bilingual mode (original and translation side-by-side) or translation-only mode. To improve accuracy, it can extract page titles and content to provide the AI with context for more precise translations of technical or literary terms.

Who it’s for

Language learners of all levels who want to read foreign language web content, watch YouTube videos with translated subtitles, and practice pronunciation using integrated text-to-speech tools.

Highlights

• Context-Aware Translation: Uses page content to ensure technical and ambiguous terms are translated correctly based on the domain.
• Flexible Display: Supports both bilingual and translation-only viewing modes.
• Multi-Provider Support: Connects to 20+ AI providers including OpenAI, Claude, Gemini, and DeepSeek, as well as free options like Google Translate.
• Integrated TTS: High-quality AI voices via Edge TTS for pronunciation practice across 80+ languages.
• Cost Efficiency: Implements intelligent request batching to reduce API token usage and costs by up to 70%.
• YouTube Integration: Translates subtitles directly within the YouTube video player.