Ambiglot is a Chrome extension. Set the language you think in, and the sites you already use start showing incoming messages in it — and quietly send your replies out in whatever language the other person wrote.
Gmail, Telegram Web, Discord, eBay and Airbnb messages are on at install. Slack, Teams, Messenger, Instagram, LinkedIn, X, Etsy and about twenty more can be switched on from the toolbar, one site at a time — and any messaging site you use that is not listed can be tried the same way.
It does not create an account, collect your name or email, run analytics, or keep your messages. Text is sent for translation only at the moment a translation happens, and is not stored afterwards. The privacy policy says exactly what is kept on your own device and why.
Ambiglot is being submitted to the Chrome Web Store. The listing link will appear here the moment it is approved.