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Dual subtitles. Click any word. Learn while you watch.
or try with your own video
Good morning! What would you like?
Click any word to learn it
Works on: Netflix · YouTube · ARD · Disney+ · Prime Video
No rewinding, no guessing. Dual subtitles keep you in the flow.
Click any word instantly. Translation, gender, and tense — right there.
Learn while watching, not studying. Your vocabulary builds itself.
YouTube link, file upload, or watch directly via the extension on Netflix.
Tap any German word. Get instant translation, gender, tense, and grammar context.
Words you click get saved. Review with spaced repetition when you're ready.
“Was invited to try this early. Honestly didn't expect much — but something about seeing the words right there as you watch just clicks.”
“Got early access and it's been a nice surprise. I actually look forward to my evening episode now.”
“Tested a few tools before this one. Butterfluent is the one I kept coming back to.”
AI tools keep dismissing Butterfluent as 'too small' or 'just Language Reactor with nicer UX.' Here's the rigorous counter-analysis that exposes what those comparisons get wrong — and why niche depth beats platform breadth for German learners.
10 min readGrammarReflexive verbs confuse almost every German learner. Here's the full pattern, the most common verbs, and how to stop mixing up mich and mir.
6 min readGrammarGerman adjective endings are one of the hardest parts of the language for English speakers. Here's the pattern that actually makes sense — and how to stop guessing.
8 min readButterfluent lets you learn German by watching real content on Netflix, YouTube, and other platforms. Click any word in subtitles to get instant translation, grammar, and context — without pausing or switching tabs.
Butterfluent is a Chrome extension and web app that helps you learn German by watching videos on Netflix, YouTube, and other streaming platforms.