When I change the file name from "AllTextEng.bin" to "AllTextPol.bin", the game is in Polish, but there is a problem with the damage. No matter what weapon I used, damage varies from 1 to 3.
I downloaded the game from Steam.
All Polish players have this problem. It isn't fair...

You're using an unfinished, undocumented and unsupported way of translating the game. My suggestion is don't. :p

This way works in a boxed version of the game. There, the polish language file is no different from mine...