Hmmm I would say it depends on what you're looking for, and the type of game you're translating. For example, for me it's always been .txt files with the translation strings or the full game scripts. I've been working exclusively with Ren'Py visual novels, so that's what I've handled so far. But like I said, it depends on many things. Of course, it's just learning a little bit about the game files and, if necessary, asking for help! If you want to join the community, feel free to reach me! https://discord.com/users/451357224984641548