More than 10 years ago I built a Firefox extension that was using the clipboard. It was for Multilanguage users that accidentally type in the wrong language, on

More than 10 years ago I built a Firefox extension that was using the clipboard. It was for Multilanguage users that accidentally type in the wrong language, once they notice they type in the wrong language, they clicked a button/hot-key, and the text would switch to an alternate language in their OS. I was eventually in the process of switching it to a Windows app, so it could also work outside the browser, but never actually finished it. Now that I think of it, I'm pretty sure something like a password manager would also need the clipboard.