How to enable Polish language text ?

Edit: I did't found it ingame and I don't use gog galaxy,
but was able to change language by editing file
Documents\My Games\Kalypso Media\Crookz\Config\HeistEngine.ini
Line 39:

Language=INT

change to:

Language=POL

or any of:
DEU
ESN
FRA
INT
ITA
POL
RUS

Awesome thanks... will try this later...
was yesterday searching where i can change the language to german.

You'll get german dubbing also. Only polish version isn't dubbed. ;)

I'm totaly ok with english version, the only reason looking for my language was fact that demo on steam had auto-polish text. It was kinda itchy to do some research why GOG version is hardlocked to "International". :P