Linglass — Dual Subtitles & AI Translator

Learn languages on YouTube, Netflix, Viki & iQIYI. Dual subtitles, click any word to translate, save words as flashcards.

Linglass shows dual subtitles on YouTube, Netflix, iQIYI and Viki, translates words and phrases in context, and turns them into flashcards with spaced repetition. 📺 Dual Subtitles Where You Watch - Two lines at once: the original and your own language, one above the other — bilingual reading, no pausing to look things up - Click any word for an instant translation that fits the scene, or select a phrase for a full one - Save a word straight from what you're watching — the sentence, its translation and the frame are attached to the card ✨ AI Subtitles for Videos Without Captions - YouTube videos with no captions at all: Linglass transcribes the audio with AI and translates that transcript into your language - Smart segmentation breaks speech into readable lines instead of word-by-word fragments — auto-generated captions become something you can actually read - Free every month, with a monthly allowance; Premium removes the limit 🔍 Contextual Translation - Click a word — a popup dictionary opens over the video with the meaning it has in this sentence, not a generic entry - Select a phrase for an accurate multi-word reading - Phonetic transcription and native pronunciation audio - Works in the YouTube player and on any webpage 🤖 AI Grammar Explanation - Select any sentence — in a video or on a webpage — and get a structured grammar breakdown - See which constructions are used, with a CEFR / JLPT / HSK / TOPIK level label so you know what's worth learning next - Understand the role of each part of the sentence in your native language 🧠 Smart Flashcards with FSRS - Spaced repetition adapts to your memory - Review with real context — the sentence, its translation, and the frame it came from - Track your learning progress and streaks 🌍 Languages You can learn 16 languages with Linglass, and read the translation in any of 23 native languages. The 7 additional ones are translation targets only — not yet available as languages to learn. The current list is on our website: https://linglass.app 📱 Available on iOS and Android.