1,000 times better than this “YouTube™ Comment Translator by BlanCow.” That developer didn't even manage to include German in the language selection.
But they did include Maori. Even though German is, after all, a world language!

Works as intended

An independent third-party developer implements through the app what should be a settings toggle.
So far, no issues or glitches have been reported.
Thanks to them for that.

Great addon, but it has one major flaw: I want to keep the original subtitles over any generated and over any auto-translated ones. I can only have that with the respective settings turned on, but that also auto-enables subtitles on every video which I do NOT want. I want the translation shenanigans fixed, but the subtitles turned off by default which the addon can't do. If I switch the subtitles options off and then enable subtitles in a video, I get the translated garbage instead... please add a subtitles initial state on/off option as well!