I'm Spanish, from Spain. We eat dinner at 8-9, maybe 10 if it's out, 11 is way too late to have dinner, people go to sleep before 12. I did the same outside of Spain too because of habits.

Lunch is at 2pm too.

Siesta (aka nap, idk why people idolise the word when there's a direct translation) is right after lunch since eating gives sleepiness appparently, but that's not really a thing anymore, we need to work until 5-6pm and there's shit to be done after that.

Idk about the Spanish people outside of Spain you know, but I'm from Spain, living in Spain. Oh, and most people start working at 8 although I try to find places where it's 9-6 because I stay way too late, but that's a me thing.

Siesta would definitely make sense in Germany. It's not as hot as Spain, but it makes up for it by being very unprepared for summer in terms of architecture and the presence of air conditioners, it's quite humid and most cities are far away from the sea. Finding an employer who lets you do it is another matter though ...