Kind of baffles me how so many people are outraged about lack of updates to an MTL Unity title - Unity titles are usually the easiest to translate without needing anything more than a few plugins, as long as the text that needs translating isn't stored in images.
Hint: XUnity.AutoTranslator - it can be used with ReiPatcher or BepInEx - I think I even remember seeing a bunch of threads detailing how to use XUnity here on F95.
Just keep in mind to rename folders containing japanese letters if you want to use BepInEx - if the _Data folder is in Japanese then you'll need to rename the ("Whatever file you launch the game with").exe file and the Data folder to the same name (+_Data).
Does absolutely no one do any research of their own?