This season is going to be tough and financially tight. The UC just underwent some serious budget cuts, staff losses, etc. So, here is my advice: If you have the time and money (app fees aren't cheap) to put into this application, you might as well do it. However, you must remember that you'll be competing with more people for fewer spots. Among the people with whom you'll compete are people who already possess BA's and MA's in Literature (whether English, comp lit, comp and rhet, etc). Of these, many will have substantially high GRE scores and GPAs. Writing samples include items such as a few essays (when they say 25 pages cumulative, don't submit more than two papers totaling 25 pages. Go for two papers of around 12-15 pages in length, since you probably won't have a min. 25 page paper on a lit. specific topic as an English minor). Also, in regards to your language ability, they don't look for conversational fluency, they're looking for literacy. So, you would have to convince them that you can read Spanish texts fairly well. Of course, they'll admit people whose language skills need work, but that's usually because those individuals had stellar applications.
Remember that applying takes a lot of time, and the fee can be pricey. I'm not totally discouraging you, but you should find out what they average GPA's and GRE scores of prior applicants were. If you could find out how many entered with a non-humanities bachelor's degree, that might be more telling as to their flexibility.