I'm really interested in any music scenes that are non-English-speaking. I don't know much about Spanish language music but I'm happy that this thread exists! All those posts by Zabarqal look very interesting, I hope i have time to go through all of them.
Has anybody mentioned Hundergrum? They are an excellent record label specialized in Spanish psychedelic rock music from the past decades. I have their compilation "Acid Rumba: Gipsy Grooves 1969-1976" and it's very very good! Here's a short description of the compilation I found from the web: "Long-haired session musicians armed with electric guitars and drums started to get involved with flamenco and rumba singers, creating an explosive sound: fuzz & wah guitars, Moogs and Farfisa, drum breaks and soulish horns blend with exotic flamenco & rumba percussions and raw vocals."