I've been using Textractor for it (with the base RPG_RT.exe), but it doesn't seem to work with EasyRPG. Basically, pick one: playable or readable.
If anyone knows of a machine translator that works with EasyRPG, I'd love to hear of it.
I should also add that the content error (at least I think it's the content error? I've run into it twice in the Life Science Institute, for two of the transformations there) can be bypassed if you download a fresh untranslated copy of the game, copypaste your English savefile in, run the event, save it, and then paste it back into your English game folder and pick back up where you left off. Textractor ensures you can follow along with what happens while you're on the untranslated version.