Immersive Video Language Practice
Paste a YouTube link, load subtitles, and start listening / shadowing / dictation practice
LangKey Extension Not Detected
LangKey relies on the browser extension to extract YouTube video subtitles and bilingual alignment. Please install the extension and refresh to unlock full practice.
Dictation Mode
Play sentences and type what you hear — real-time feedback
Shadowing Mode
Read aloud with subtitles, speech recognition gives instant feedback
Listening Mode
Blur subtitles to train pure listening comprehension
Fill-in Mode
AI randomly masks key words to test your vocabulary and context feel
LangKey Platform Complete Walkthrough
4 simple steps to unlock YouTube & full-web immersive language learning
🧩 1. Install & Pin Extension
Search for LangKey Extension on Chrome Web Store or LangKey Home.
Click 'Add to Chrome' to complete installation.
Click the puzzle icon 🧩 in browser toolbar and pin 📌 LangKey.
After installation, refresh this page to trigger the immersive practice component!
🚀 2. Video Practice & Vocabulary Link
Copy any YouTube video link, paste it into the box and click 'Get Video'.
The right panel displays bilingual subtitles. Click ▶ 00:17 to seek video.
The left panel automatically scans and matches your favorited vocabulary.
Practice with dictation, shadowing, fill-in, and AI speaking evaluation below!