Questions, answered.

Yes. Watching with bilingual subtitles is free in all 67 languages, with a daily energy limit, and practice gives you a free portion every day. Pro removes the limits and adds in-depth explanations and part-of-speech colouring.

iPhone (iOS 18+), iPad (iPadOS 18+), Mac with Apple Silicon (macOS 15+). On a computer, the free PlayLingo extension for Chrome shows dual subtitles on YouTube.

All 67 languages that YouTube makes automatic captions for: Afrikaans, Albanian, Amharic, Arabic, Armenian, Azerbaijani, Basque, Belarusian, Bengali, Bulgarian, Burmese, Cantonese, Chinese, Czech, Danish, Dutch, English, Estonian, Filipino, Finnish, French, Galician, Georgian, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Javanese, Kannada, Khmer, Korean, Lao, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Marathi, Mongolian, Nepali, Norwegian, Persian, Polish, Portuguese, Punjabi, Romanian, Russian, Sinhala, Slovak, Spanish, Sundanese, Swahili, Swedish, Tamil, Telugu, Thai, Turkish, Ukrainian, Uzbek, Vietnamese and Zulu.

Any YouTube video works. Uploading your own video files or using videos from outside YouTube isn’t supported yet.

Lingo replies in the language you set as your native one — and explains the language you're learning in context.

Lingo runs on a state-of-the-art large language model fine-tuned for language tutoring. When you tap a word or phrase, Lingo sees the full subtitle context, the speaker's tone, and the video topic — and gives you a contextual answer rather than a dictionary definition.

Yes. You can switch the learning language anytime from settings. Your saved words and progress are tracked separately for each language, so nothing gets mixed up.

Language Reactor is a Chrome extension for desktop. PlayLingo is a native iPhone, iPad and Mac app — built around a deeper AI tutor ("Lingo"), faster on mobile, and works with any video player without browser tricks.

Yes. We only collect minimal anonymous usage data to improve the app. No personal info is sold or shared. Full details in our Privacy Policy.

From beginner (CEFR A1) to advanced (C1). Each saved word is tagged with a difficulty level so you can pick videos that match where you are — or push slightly above to grow.