Given that the other parts of your application are good (MCAT, GPA, recs., etc.)then being able to speak two languages, especially spanish is a great help. I am bilingual, spanish was my first language, and I can't tell you how many times when I was volunteering in the ER that a doctor who could barely say taco or burrito was trying to tell a family what was wrong with their loved one and if they would be okay. And this was in the whole ER, many times not one doc. there would be able to speak spanish. There are interpreters but many people would feel better hearing it directly from the doctor. I agree there are some states where there are not many hispanics but for the most part schools in big cities have to serve a diverse population so your talents will definitely help you out. Make sure you mention this as a selling point during your interviews. I don't think it is enough to get you in on your own, but it is definitely a strength and will allow you to serve a greater variety of people.
