Language Reactor

Language Reactor is a browser extension and web platform that helps language learners discover, understand, and learn from native materials. It supports Netflix, YouTube, webpages, and uploaded books, offering bilingual subtitles, precise playback controls, instant dictionary lookups with AI-powered explanations (Lexa), and smart vocabulary highlighting that recognizes word forms across all content. The tool includes a listening practice mode (PhrasePump) that reinforces saved words, export to Anki for spaced repetition, and a chatbot (Aria) for conversation practice. It also provides access to structured FSI/DLI government training programs. Language Reactor supports 40+ languages, with free core features and an optional Pro Mode for additional capabilities like speech recognition. Designed to make immersive language learning accessible without travel, it has been featured by The Verge, The Guardian, and Lifehacker.