I would certainly try to learn it, but can't make any guarantees. It would also depend how rare the language is. If one is going to learn a language, it might as well be applicable, right?
Most Helpful Girl
I'm Spanish and my boyfriend is Italian. None of us or our familys understand each others language so we all speak English. At first I was willing to learn Italian as long as he also learned some Spanish, I was very commited to it but he didn't show any interest so we would always end up with stupid fights. Basically I got tired and give up.