Language Reactor

Overview

Language Reactor is a powerful browser extension designed to help language learners discover, understand, and learn from authentic native materials. Formerly known as Language Learning with Netflix, it has evolved into a comprehensive toolset that works across multiple platforms, including Netflix, YouTube, podcasts, and even imported books or webpages. With over two million users, it turns everyday streaming and reading habits into structured language practice, offering an immersive approach that is both effective and engaging.

At its core, Language Reactor provides bilingual subtitles, enabling learners to see both the target language and their native language simultaneously. This visual mapping helps users tune their ears to natural speech patterns while building comprehension. The tool includes precise playback controls such as auto-pause, adjustable speed, keyboard shortcuts, and gesture navigation, giving learners full command over their study pace. A built-in dictionary allows instant word lookup with authentic example sentences and audio, while Lexa AI offers contextual explanations of how words are used in real situations.

The vocabulary management system is designed to maximize retention. Smart Highlighting recognizes saved words across all their forms—plurals, conjugations, and related variations—reinforcing learning naturally across different content. Phrase Pump provides listening exercises that reintroduce saved words in new sentences, and exports to Anki generate beautiful flashcards with screenshots and audio clips. For active practice, users can engage with Aria, an AI conversation partner that gives instant corrections and encourages real communication, or follow structured FSI/DLI drills adapted with modern tools.

Language Reactor supports over 40 languages, including transliterations for non-Latin scripts, making it accessible to a wide range of learners. While optimized for desktop browsers, it also works on phones and tablets. Optional Pro Mode enhances the experience with speech recognition and machine translation for seamless comprehension. Whether you are a beginner or an advanced learner, Language Reactor helps you learn from content you already love, turning passive entertainment into an active, rewarding language laboratory.

Core capabilities

Bilingual Subtitles

Display target and native language subtitles simultaneously to understand meaning and build listening skills.

Precise Playback Controls

Auto-pause, speed control, keyboard shortcuts, and gesture navigation allow full control over video playback.

Dictionary & Lexa AI

Instant word translations with authentic example audio, plus AI-powered contextual explanations.

Wide Language Support

Learn from content in over 40 languages with transliterations for non-Latin scripts.

Smart Highlighting

Saved words are automatically recognized in every form, including plurals and verb conjugations, across all content.

Phrase Pump

Listening exercises that reinforce saved words, introduce new vocabulary, and support both beginner and advanced learners.

Anki Export

Create beautiful flashcards with screenshots and audio clips for seamless import into Anki.

Aria AI Practice

Chat with a quick-witted AI language partner for instant corrections, topic exploration, and speaking confidence.

FSI/DLI Drills

Structured government-program speaking drills and exercises enhanced with modern tools.

Cross-Device Support

Works on phones and tablets as well as desktop browsers, with continuous improvements.

Use cases

Watching Netflix series with dual subtitles to improve listening comprehension

Using YouTube videos on favorite topics to build contextual vocabulary

Importing e-books or webpages and listening with text-to-speech

Practicing speaking and receiving instant corrections with Aria AI

Reviewing learned words through Phrase Pump listening exercises

Exporting rich flashcards to Anki for daily spaced repetition

Following structured FSI/DLI drills to enhance fluency