Sweet for breakfast is common in most of France, to be honest. I think Spanish people like their sweet things for breakfast as well.
Source: I had "pain au chocolat" for breakfast this morning.
OK, OK, I had a LOT of pain au chocolat VERY LATE today, but it still count as breakfast. ๐
Salty breakfast is more of a germanic / anglo-saxon thing but I am not holding that against our neighbours!