Privacy policy

Last updated: 8 November 2026

The extension

On YouTube, Netflix, Prime Video and Disney+, Zweisprach reads the subtitle text shown in the player, the video title and the page address, only to translate subtitles and to save the words you choose. On other video sites it runs only after you click “Turn on for all video sites” in the side panel and allow it in Chrome, and only on pages with a video. If a video has no subtitles, Zweisprach reads the video's sound (including the part the site has already downloaded ahead) to transcribe it.

To translate, the subtitle lines, the words you click and (for videos without subtitles) short audio clips are sent to our server and processed by Cloudflare Workers AI. They are used only to produce the translation and are not stored by us. Your settings, saved words, history and caches stay in your browser. Your licence key or a random trial ID is sent with each request so we can check access; we don't link it to your identity.

This website and payments

Payments are processed by Stripe as merchant of record; we never see your card details. To show your licence key, our server asks Stripe whether your order is paid; it doesn't store your data. Stripe's privacy policy: https://stripe.com/privacy. This website uses no cookies and no ads. We use Vercel Web Analytics, which counts page views without cookies and without identifying you (no IP addresses or personal profiles are stored), to see which pages are visited and where visitors come from. It is hosted by Vercel, which processes standard server logs.

Early-access list and usage counts

If you join the early-access list, we store your email address, the date and where you signed up, only to tell you when Zweisprach Pro launches (consent, GDPR Art. 6(1)(a)). You can withdraw at any time by emailing us, and we delete it. To see whether people find Zweisprach useful, the extension and this website send anonymous counts (install, daily use, a click on "Get Pro", reaching a free-plan limit, a visit) with a random ID that isn't linked to you. Data is stored with Upstash (EU region where available).

Your rights

You can ask us about, correct or delete your data at any time (GDPR Art. 15–21), and complain to a data protection authority. Contact: Rashmita Chauhan, Brienzer Str. 53, 13407 Berlin, chauhanrashmita223@gmail.com.