My final verdict is this: It’s technically possible to play through a bishoujo game (or an otome game) with a translation app, but there’s no true replacement for actually knowing the language.
I’d only recommend doing it if you badly want to play a dating sim.
Spend time with the ones that strike your fancy and ditch the ones that prove to be a bore! Pick you dates wisely and you will flap off into the sky with your one true love.
Take the wrong turn and you may well end up murdered in your bed.
Heck, the genre is starting to take off here or at least its visual novel equivalent, and elements of the genre are seen in all sorts of games, including Western IPs.