1. For buildings, the first story is 0 floor, second floors are 1st floors, third floors are 2 second floors, etc.
2. A story (floor) of a building is not a piso, it is a planta.
3. Your seat on a bus is a plaza, not an asiento.
4. In Northern Spain, when you order a menu del dia, instead of getting a choice of coffee or tea, you get a choice of coffee or wine. When you order wine, they bring you a bottle of Rioja and you can drink the whole bottle, they don't care and they don't charge you any more. Menu del dias usually are 9 euros.
5. It is popular for women young and old to dye their hair flaming red.
6. Spaniards don't eat spicy (picante) food. What they consider very picante is mild, mild, mild.
7. If you are female and have a hot body, you are required to wear leggies. It must be a law.
8. If you sing on a subway for tips, Spaniards will not tip you. There was a nice lady in a professional blazer & blouse who sang a very passionate “Killing Me Softly” in English and got no money.
9. If you are male and go to a museum and have a small backpack the size of a small purse, you have to check it in the cloak room; if you are female with a large purse, you are allowed to walk in without checking it.
10. Spaniards wear their wedding band on the right hand and not on the left.
11. Spaniards don't shorten “autobus” to “bus”, it is always autobus.