Hi,
i have more than 30 games and major in italian language.....
How can i help you with my games?
Post image of them on server hosting?
Thanks
Cris

Even if you donate all your games to GOG, they still have to get authorization from copyright holder to sell them.

Hi, you could try contacting Support and one of the staff who has done work in this area in the past - https://www.gog.com/u/JudasIscariot. Like was mentioned, there are legal issues involved but it's possible GOG may be able to solve those. They've been able to use user-submitted languages and other content before, there's just no guarantee. It's always nice to see more languages for old classics added though; whatever happens thanks for the effort!