While I understand your issues and don’t want to discard them, it could be worse.
I’m Belgian (from the Dutch-speaking part), and so English is only the third language we are taught in school (usually: 1. Dutch 2. French 3. English 4. German). I believe that many countries have English as a second language option in schools, I could be wrong about that though.
Music terms are also different in Dutch, just like in German.
20% to 25% of the world population can speak English (as native speaker or 2nd/3rd… language) so it is the language to pick to reach as wide as an audience as possible.
And your point about Russian is nonsense, because there’s more people in the world speaking Russian than there are speaking German. So by that logic, the only second livestream about v3 should not been in German.
And:
So for my mother (who is not proficient in English, like I like to believe I am), I had to create her own little cheat sheet / reference guide, because there’s not even a v1 or v2 manual to read through.
But yeah, it sucks that v3 isn’t documented in German (yet).
Other annoyances of being Belgian:
Our default keyboard layout is AZERTY, which also produces numerous issues with keycommands in programs like Dorico (I think we should use QWERTY, like our Dutch neighbours, but that’s another discussion).