Unfortunately I have seen OSTs, albums and even a single song in an otherwise fully available album removed from Spotify, but it is indeed very inusual.
In my city in Spain I remember them from when I was a child. They were removed during the early 2000s.
But ten years ago, last time I visited, they still had some in Seville.
I mean, Galicia, País Vasco, Valencia, Baleares, Asturias... also have different languages. There's plenty of regional languages in Spain. https://en.m.wikipedia.org/wiki/Languages_of_Spain