Here's how you change it into english:
Go into your game-folder, right-click on the game shortcut and click on properties.
Then in the Box that says Target add -culture=en behind the last quotation mark.
It should look something like this (without the "[" and "]" ):
["C:\Spiele\GOG Games\Absolver\Absolver\Binaries\Win64\Absolver-Win64-Shipping.exe" -culture=en]
I guess it will work with the other languages aswell as long as the game supports them an you know the abbreviation.
Props to the guy on the Steam-Forum for figuring it out.
Nope, doesn't work. I don't know what I did wrong but still stuck with native language. Just so we're clear, you mean the .exe shortcut or the actual .exe? In what specific folder is it?