Comment 4 for bug 1917810

Thank you Dimitri for the answer.

1. It's really weird it has saved it after the first boot and even kept in the system after the install. It wasn't even possible to change that.

2. No I didn't get it until I had to open language preferences, "manage installed languages" button opened an other window which prompted me to install some stuff. I did, but couldn't change the language anyway. After that I accepted some other updates (I guess apt upgrade) which required a reboot, after that I got russian without altering any other settings.

3. That's really sad. I haven't set up the desktop ubuntu for years, so I thought that's just the raspberry pi version is broken. If that's a known thing, why there's no fix?

6. It finally changed to russian as I described in p. 2. But it's really frustrating for people who don't know english to perform such an install.