Linglass turns YouTube and Netflix into language practice. It shows two subtitles at once โ the original and a translation โ so you can follow along in both, and every word is clickable for an instant, in-context translation.
Features: - Dual subtitles on YouTube and Netflix, kept in sync - Click any word for a contextual translation, native pronunciation (text-to-speech), and phonetic help (IPA, Pinyin, Romaji) - Spaced-repetition flashcards (FSRS) โ saved words become review cards automatically, with a screenshot and audio clip from the video - AI grammar explanations that break a sentence down at your level - AI-generated subtitles for videos that have no captions (speech recognition + translation) - Word-by-word segmentation for Chinese and Japanese, so you can look up a single word instead of a whole line
Works as a browser extension on Chrome, Microsoft Edge, and Yandex Browser, as a web app, and as an iOS app. Learn 10 languages, with the interface available in 21. Core features are free; an optional Premium plan removes daily limits.
A startup from Almaty, Kazakhstan that is founded by Ilya.
Dual Subtitles
Shows the original subtitles and a translation at the same time on YouTube and Netflix, kept in sync.
Click-to-Translate
Click any word or phrase for an instant, in-context translation from the sentence.
Pronunciation & Phonetics
Native text-to-speech playback plus phonetic help โ IPA, Pinyin for Chinese, and Romaji for Japanese.
Spaced-Repetition Flashcards
Saved words become FSRS review cards automatically, with a screenshot and audio clip from the video.
AI Grammar Explanations
Breaks a sentence down and explains how it is built, adapted to your level.
AI-Generated Subtitles
Generates subtitles for videos that have no captions using speech recognition, then translates them.
Works Everywhere
Browser extension for Chrome, Microsoft Edge, and Yandex Browser, plus a web app and an iOS app.
Linglass turns any YouTube or Netflix video into a language lesson without leaving the player. It shows two subtitles at once โ the original and a translation โ and lets you click any word for an instant, in-context translation with native pronunciation. The standout: if a video has no subtitles at all, Linglass can generate them automatically with speech recognition and translate them, which typical subtitle tools can't do. Every word you save becomes a spaced-repetition flashcard with a screenshot and audio clip from the exact moment you saw it.
It works on the videos people already watch โ any YouTube or Netflix title โ not a small licensed catalog. The free tier is genuinely usable (unlimited saved words and a daily translation allowance), not a locked trial. And it combines in one place what competitors spread across separate tools: dual subtitles, click-to-translate, native pronunciation with IPA/Pinyin/Romaji, AI grammar explanations, and FSRS spaced-repetition flashcards โ plus auto-generated subtitles for videos without captions. Available as a browser extension (Chrome, Edge) and an iOS app.
Self-directed learners who study through immersion โ watching YouTube, Netflix, anime, dramas, and interviews in a foreign language instead of taking structured courses. They're typically intermediate learners who like the "comprehensible input" approach, often studying English, Spanish, Chinese, Japanese, or Korean, and want to turn the content they already watch into study material and remember new words long-term.
Linglass started from a simple frustration: watching foreign-language video is one of the best ways to learn, but the workflow is clunky โ pausing constantly, copying words into a dictionary, then into a separate flashcard app. Linglass brings all of that into the video itself: dual subtitles, one-click translation and pronunciation, and automatic flashcards. It grew from a browser extension for YouTube and Netflix into a cross-platform tool with a web app and an iOS app.
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Check the traffic stats of Linglass on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
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