Hey there,

Galaxy tells me there is an option to choose other languages ingame, but I can't seem to find it and am stuck to english. At least different subtitles would be nice.

I you open GOG galaxy and browse to the game you'll see a "MORE" button next to the green "PLAY" button.
If you click on it and go all the way down to the "Other" sub-menu where you can open the "Language Selector".

thanks!