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.
Nah, there’s probably language specific communities you haven’t come across simply because English communities tends to be bigger. They’re not necessarily much smaller either.