Now that I express it, it feels kind of obvious; anything with a small enough subculture will start speaking English for it. specifically I’ve really stopped watching german minecraft videos, and am only in English-Speaking Discord servers, and maybe this is only so non-obvious to .e because Germany is relatively big. I’ve heard smaller countries don’t even have literally every TV programme dubbed in the local language.
Drei Fragezeichen are very niche in a global context, I don’t see the fandom speaking English.
International subcultures will obviously default to English, regardless of size, simply because English is the global lingua franca (unless there is very good reason to pick a different language).
Asterix as well. Despite it being multi-lingual.