>>25262961There is no easy way to import your puppets from one base game's save file to another base game's save aside from using an editor, but if you're fine with waiting another few months until the expansion is translated, you can carry over your save data to the expansion, and your previous puppets will be unlocked late in the postgame.
Otherwise, if you just want to play the base game with the English patch, I'd suggest forgetting about your old puppets for now and starting a new save. You can always back up your old save and return to it after clearing everything on the new save file.
