Tried it in standalone version 2.1.17. Still cannot type in cyrillic. I am still on linux mint with cinnamon.
I also tried installing ibus and after this it started working in standalone version. I don't want to keep ibus on my system though

I have a very similar problem with cyrillic. I am also on linux mint, on version 2.1.16. everything is fine on stable 2.0 version
I cannot type anything in cyrillic with both english and russian in-game languages. In-game cyrillic text shows up just fine and i also can paste in cyrillic text.
I also ...