Let's just say that the English here ain't the worst I've seen.
It honestly ain't all that bad compared to a lot of the gibberish MTL's.
So pretty good on that.
However ... the same can't really be said for the game itself.
I'm not sure where exactly the issues are to be found, but all the menu options are broken (tutorial, progress tracking/CG list, ...). Not just untranslated, they're really broken. This isn't gonna be CommonEvents.json.
Also ... the 'filtering' in the game's options is also broken. With the MTL ... from the get go you have pretty much all options there. All outfits, all 'stripping' options which are to be gated behind the 'horny' value pretty much ignore said value as well.
That ... is probably CommonEvents.json I guess.
Seems like some of the 'formulas' have gotten jumbled up somewhere and aren't considered math anymore.