thp1972: Hi, I would like to make an appeal: why not do like Steam that proposes games in other languages?
Short answer: distribution rights
Modern games, especially in the last few years, are more often than not distributed in multilanguage format right from the start, so the localization might be assigned to 3rd parties but the distribution rights are retained by the main publisher alone.
With these kind of games, both Steam, GOG and others have access to all the languages with minimal effort.
Older games however were usually english (or another main language) only, and the localization
AND DISTRIBUTION rights were granted to local publishers.... since you're from Italy too, you might remember CTO, Leader etc.
In this instance GOG needs to obtain the rights from multiple sources, which usually proves to be a headache, if not straight impossible when the companies doesn not exists anymore, have changed owners and so on... that is exactly the same kind of issue that is olding back the much requested SS2