Don't use the built in english setting. That's bugged to hell and doesn't work.
I haven't confirmed it, but I assume the update to the first post is the version someone shared with the update with reipatcher preinstalled and set to deepL. So, use the japanese setting and then you'll need an active internet connection and to wait a little while for the translation to pop up.
Reipatcher is a translation overlay that reads text from unity games and translates in real time, but it does take a little while the first time a new piece of text shows up.