ZweisprachLearn languages from
the shows you love
Dual subtitles on YouTube, Netflix, Prime Video, Disney+ and any other video site, even films without subtitles. Click any word to understand it, save it to your own dictionary, export it to Anki.
Get Pro · €14.99 once Add to Chrome, freeTry it free: 30 minutes + 25 saved words · Pro: unlimited, €14.99 once
See how it works
A 90-second walkthrough, from installing it to saving your first word.
Installed it, but can't see it?
New extensions hide behind the puzzle piece at the top right of your browser. Three clicks and it stays where you can see it.
- 1
Click the puzzle piece at the top right of your browser, next to the address bar.
- 2
Find Zweisprach in the list and click the pin next to it.
- 3
The Zweisprach icon now stays in your toolbar. Click it and the panel opens on the right.
It's the same in Chrome, Edge and Brave. In Arc, open the Extensions menu at the top of the screen. Still nothing? Type chrome://extensions in the address bar and check that Zweisprach is switched on.
Two lines, perfectly in sync
The original subtitle on top, your translation underneath, word by word as people speak.
16 languages, both ways
English, German, French, Spanish, Italian, Portuguese, Dutch, Polish, Turkish, Russian, Ukrainian, Arabic, Hindi, Japanese, Korean, Chinese.
Click any word
Meaning in context, grammar, and for German der/die/das and the plural.
Your own dictionary
Every word you save, with the sentence you heard it in. Search it, add notes, export to Anki.
Any video site, even without subtitles
Plex, free movie sites and more: Zweisprach listens and writes the subtitles ahead of time, so each line appears the moment it's spoken.
Private by design
No account, no tracking. Your words stay in your browser.
Free: 30 minutes of subtitles and 25 dictionary words to try it
Buy nowTry it free first: 30 minutes + 25 words
Questions
How does it work?
Open a video and choose two languages in the Zweisprach side panel: the language spoken in the video, and the language you want it translated into. Only the subtitles change, never the sound. You'll see the original line on top and your translation underneath, in sync with the speech. No subtitles on the video? Zweisprach writes them itself. Click any word to see what it means and save it.
What's free and what's in Pro?
Free: 30 minutes of translated subtitles and 25 dictionary words, so you can try everything. Pro: unlimited subtitles and an unlimited dictionary for a one-time €14.99. No subscription.
How do I unlock Pro after buying?
Automatically. Buy in the same browser where Zweisprach is installed and it unlocks by itself. Using another computer? The thank-you page also shows your licence key to paste in.
Which sites and languages does it support?
YouTube, Netflix, Prime Video and Disney+ work right away. Any other video site (Plex, free movie sites and more) works after one click on “Turn on for all video sites” in the side panel. Your own video files work too. 16 languages in any direction, and the side panel itself comes in English, German, French, Spanish, Italian and Hindi.
What if a video has no subtitles?
Zweisprach listens to the film and writes the subtitles for you. On most sites it does this ahead of playback, so lines appear right on time; on a few it runs live, a couple of seconds behind. On Netflix, Prime Video and Disney+, turn on the service's own subtitles.
Which browsers and devices?
Google Chrome, Brave, Edge and Arc on Mac, Windows and Linux. Phones and tablets aren't supported yet.
Is my data private?
Yes. No account, no tracking. Your saved words stay in your browser. Subtitle lines, and short audio clips for videos without subtitles, are only sent to be translated or transcribed and aren't stored. Privacy policy