Can a PhD (Or a doctorate or an MD) choose to use a gendered title instead of Dr? For example, suppose an AFAB PhD comes out as a trans man. Is he allowed to use Mister to affirm his gender? Or is he stuck in the gender neutral Doctor zone forever? Does he have to get knighted by the British monarchy in order to get a masculine title?
Only in the US and a select few other countries…
In other places, ‘Professor’ is a specific academic rank - there’ll only be a few professors in a university.
In those other areas there are plenty of other English titles you can use. “Instructor” is always fun!