Quite frankly, I don't think the FCC pays that much attention to Spanish (or other foreign language) radio. I remember Bill Handel (KFI, Los Angeles) saying something to that effect one morning. The Spanish-language stations in LA, according to him, got away with a lot more sexual innuendos and other questionable content than the English-language stations did.
Besides, for the FCC to do much,
a. Someone would have to go to the trouble to make a complaint
b. The FCC would have to tune in and hear the content for themselves, and
c. Care enough to warn, fine, or otherwise sanction the station