For me it wouldn't even need to be public, but for those like me who have forums in Spanish, or any Latin-based language, it would help a lot.

Example, in the ubbt_registerednav.tmpl, it says,
Bienvenido donJulio.
At my site. I'm male, so Bienvenido is correct. If I was a female, it would be Bienvenida. I'm sure there is a myriad of other examples where distinguising a persons sex in the php file and calling a correlating adjective in the langauge file would help. For me, and Spanish in particular, this is really an issue only with adjectives.

That makes two suggestions from me <img src="https://www.ubbcentral.com/boards/images/graemlins/smile.gif" alt="" />