So, that’s basically the question… I’m thinking mainly film and TV here. Why wasn’t there much science fiction created in Spanish?
My first thought was it’s more of an English/American cultural thing, but there is of course a robust enough history out there of German and Japanese interest in science fiction.
Spanish filmmaking goes back about as far as Hollywood does… and it’s not a “cost” thing, because early sci-fi was clearly done on a dime.
Even today it seems the Spanish language networks aren’t particularly interested in picking up El Doctor Quien or Estrella (I forget the word for Trek… Google Translate says excursión)