Polish fonts/letters both on Beamdog Client and Steam

Hi, I’m creating module and I havent polish letters (óńśćźż…).
I’ve tried to download from Vault this: https://neverwintervault.org/project/nwn1/other/gui/plfont
but it won’t help.
It happens when I’m trying to start game from BD Client and Steam.
Are there any other issue?