Like cccmar said, not many translation lists exist, yet alone are maintained. Best try is checking personal projects and help wanted. For RPG ones I know exist, there's aqualung who's doing jungle wars 1 and 2, Risae is doing Growlanser 6 VI, not sure if they need more help, but they have a discord so you can ask. There's was also Ripper5555 who's doing Gunnm: Martian Memory, who was using the deepl translator only, you can ask him if you can be his translator. There's quite a bit, and not just RPG's, Olivia's Mystery is open to translation with the text on Google drive, and that's a puzzle game.