Learn languages with dual subtitles on Netflix, YouTube, Prime Video, Disney+ and HBO Max. Click any word to translate and save it.
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Version
0.32.4
updated 12 Oct 2026
About Dual Subtitles: Netflix, YouTube, Prime Video, Disney+ | Fluent by Accident
Learn a language from the films and videos you already watch.
Fluent by Accident shows two subtitle lines at once: the language you are learning on top, your own language below, timed to the same moment. Click any word to see its translation, save it, and review it later with flashcards.
WHILE YOU WATCH
- Two subtitle lines on Netflix, YouTube, Prime Video, Disney+ and HBO Max, perfectly in sync
- No subtitles in your language? Fluent by Accident translates them for you
- Click a word to translate it; drag across words or Shift+click to translate a phrase
- Save words, phrases and whole sentences with the film title and the moment they came from
- Keyboard: A previous line, S repeat, D next line, R repeat slowly, W save, T reveal
- Learning mode pauses after every line so you can read at your own pace
- Hide the translation until you want it, or show one line only
- Change size, colour and background of each line, and move the subtitles where you like
ON ANY WEBSITE
- Select text and click the Fluent by Accident button, or Alt+click a sentence (Option+click on Mac)
- Or right-click selected text and choose "Translate with Fluent by Accident"
- Save words and sentences from articles to the same list
REVIEW
- Flashcards with spaced repetition (the cards you know come back less often)
- Export to Anki or CSV
PRIVATE BY DESIGN
- Free account: your saved words become flashcards on every device
- Chrome's built-in translator works on your computer when it is available
- No ads, no tracking, nothing sold
Free account needed. Free plan: dual subtitles, translation, click-to-translate, 100 saved words, flashcards, CSV and Anki export.