I will be speaking with our development team here at Gamepedia to see if we can move our repositories to MediaWiki's Gerrit system. Currently all the maintained extensions are hosted on GitHub.
Is it mean that in future all system messages can be translated this, at Translate Wiki, and this messages can be work with all websites of Gamepedia?
Alexia, any updates? If needed we can now sync with GitHub repositories as well (but you will need to give push permissions to @siebrand and @nikerabbit).
Contact them on Gamepedia wikis and/or involve other Gamepedia users.