[Q] How to find out if your game in library is from RU or other regions

I bought it via keys from another trader, but I'm just interested overall how to notice if you have RU copy of the game in your library since some games ( Thief, Batman ) don't have RU tag, but when you activate it, you can find out I think which region game belongs.

That's what I want to know, where to find out that informations in library.

Thank you very very much, I knew this existed somewhere :D

yea, but some games have RU tag even they're not region locked ;)