Few minutes ago, Steam downloaded 7,3 MB update and everyting seems to be OK. I tried czech language, I tried german language as well and everything works properly. Well, looks like the issue is resolved. Thank you guys and let's hope it's the last problem probably caused by Steam trolling

Yes, I tried it, you can see it in attached screenshot named options.jpg. I tried both in-game option and Steam option, even their combination, but with same result

I tried everyting you wrote. Without success. After deleting all launguages files, it doesn't download few megabytes. It downloads exactly 286,1 kb. Just these files without any localization, I quess. Looks like there is not problem with local data, I still think that activated review code somehow broke the game on my profile.

To be honest, I don't care about localization, I would accept english, I'm just afraid that this problem can lead to other problems with content in the future. Because there is another strange thing. When I try to activate development build instead of normal version or try to verify localization files again, I see download of 0 kb update