Dual Subtitles for YouTube & Netflix — Linglass

Learn languages from YouTube and Netflix. Dual subtitles, click any word to translate, save vocabulary with smart flashcards.

Linglass provides dual subtitles on YouTube and Netflix, contextual translation for words and phrases, and smart flashcards with spaced repetition. Learning a new language doesn't have to feel like studying. Linglass helps you pick up vocabulary naturally — by watching your favorite YouTube videos and browsing websites you already visit. Click any word to see its meaning in context, save it with one tap, and review it later with intelligent flashcards. The more you watch, the more you learn. 📺 Dual Subtitles on YouTube and Netflix - Original and translated subtitles displayed simultaneously - Click any word in subtitles for instant translation - Select phrases for contextual translation - Adjust subtitle font size and position - Works on both YouTube and Netflix 🎬 Netflix Support - Dual subtitles for Netflix shows and movies - Click any word in Netflix subtitles for instant contextual translation - Save vocabulary from Netflix scenes to your flashcards with one click - Cover art and scene context automatically attached to saved cards - Works with all text-based Netflix subtitle tracks ✨ AI Subtitles for Videos Without Captions - YouTube videos with no captions at all: Linglass transcribes the audio with AI and translates it into your language - Smart segmentation breaks speech into readable lines instead of word-by-word fragments - Netflix: when a title has no subtitles in the language you are learning, Linglass translates an available track into it - Free every month, with a monthly allowance; Premium removes the limit 🔍 Contextual Translation - Click any word — get meaning based on context, not just a dictionary entry - Select phrases for accurate multi-word translation - Phonetic transcription and native pronunciation - Save words and phrases to vocabulary with one click - Works in subtitles and on any webpage 🤖 AI Grammar Explanation - Select any sentence in YouTube or Netflix subtitles — or on any webpage — and get a structured grammar breakdown - See which grammatical 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 - Integrated directly into the dual-subtitle popup — no need to switch contexts 🎯 Video Catalog — Videos at Your Level - A curated catalog of YouTube videos, scored for difficulty and sorted onto Beginner, Intermediate and Advanced shelves - Every video shows its vocabulary demand — CEFR for European languages, JLPT for Japanese, HSK for Chinese, TOPIK for Korean - Shelves for everyday conversation, channels made for learners, science, podcasts, talk shows and more - Every video is checked to have working subtitles before it appears - Available for nine of the ten languages you can learn 🧠 Smart Flashcards with FSRS - Spaced repetition adapts to your memory - Review with real video context — sentence, translation, and frame - Track your learning progress and streaks 🌐 Translate Anywhere on the Web - Select any word on any website for instant translation - Wikipedia, news, blogs, articles — learn while browsing - Same contextual translation as in YouTube subtitles ⚖️ Comparison with Other Extensions How Linglass compares to popular subtitle extensions: * Language Reactor (a.k.a. "Language Learning with Netflix"): Offers dual subtitles on YouTube and Netflix with a click-to-translate dictionary and Anki export for saved words. Linglass matches the dual subtitles and translation, and adds per-word pronunciation audio, phonetic transcription, and built-in flashcards with spaced repetition — no Anki setup required. * Trancy: Supports bilingual subtitles on YouTube, Netflix, and many other video platforms, plus GPT-based grammar analysis and a mobile app. Linglass takes a more focused approach than Trancy — YouTube and Netflix only — with a free tier that includes built-in flashcards, contextual translation, AI grammar explanations, and a clean, distraction-free subtitle interface. * Migaku: Known for deep Anki integration and strong support for Japanese learners, with a paid subscription and a mobile app. Linglass takes a simpler path — flashcards are built in (no Anki setup needed), there is a free tier, and the same toolset works across 10 languages. * Lingopie: A streaming service with its own content library and bilingual subtitles. Linglass is a browser extension you bring to the YouTube and Netflix content you already watch — no separate subscription, no platform lock-in. If you've tried Language Reactor, Trancy, Migaku, or Lingopie and want a lighter, more focused alternative — Linglass gives you a complete loop for learning vocabulary on YouTube and Netflix: watch, translate, save, review, plus AI grammar explanations — not just dual subtitles. 🌍 Languages You can learn 10 languages with Linglass, and read the translation in any of 22 native languages. The 12 additional ones are translation targets only — not yet available as languages to learn. The current list is on our website: https://linglass.app 💬 Contact Us - Website: https://linglass.app - Support: support@linglass.app