whynursing?

My issue is not long or very interesting I suppose, but it really gets me in the heart. I am a caucasion girl with a mexican daddy, raised in a hispanic community with my caucasion mother. (dad was not around) I love my heritage(every one that I am) but i have worked very hard to become an LVN in the state of California and have come to a wall in my profession because I do not speak spanish. I work with a very large HMO, but am unable to move positions because I cannot speak spanish fluently. At this point, it has nothing to do with race, color,or anything of the like. Just the fact of needing to speak another language in the country that I am from. I totally agree, that if you decide to live in another country, you should absolutely learn to speak their language. So why is it so different here? Why can't I move to a position, that I am qualified for, have seniority for, and more than capable of doing if I don't speak spanish? This issue of language, is getting harder and harder to swallow every day along with EVERYTHING else you have to deal with being a nurse.