You might know about Steam workshop: in practice are tools that lets the players mod the games, by altering files of the game.
I thought it was the perfect system to enable community-supported translation of ANY Ren'Py game.
I am not sure what would be the steps needed coding-wise (I never used it and I am not a good coder), but I know that you can load any mod you want with Steam interface.
In practice, people would get access to the translation files (those generated by Ren'Py) but the main difference is that then the developer wouldn't need to reupload the translations every time they are updated (something that takes away lot of time and one of the main reasons I'm not doing them). They would be updated "in remote" by the fans doing it through the Steam workshop, and then loaded in the game, still from Steam servers so without the need to any intervention by the developer
This would help both creators who can't afford to translate the game(s), and also players who could contribute and maybe play their favorite game in their own language.
I hope it made sense. I think it could be a unique feature that could put Ren'Py above the other VN engines/system



