You need to be able to communicate with someone that you love, which means you need to speak his/her language.
I was not saying that the language is the main reason, maybe I should have said that it's a prerequiste to be interested in and to want to have a relationship more than just friendship.
A fob who just arrived to America just doesn't feel comfortable with her new life, so it's maybe a matter of time, or maybe she's just not ready yet.