Formal vs Informal In English Language

Don’t know if they are along the same line or not but Spanish has formal and informal forms.

¿Como esta usted?
¿Como estas tu?

Both translate to English as “How are you?’ The first form is the formal, used when meeting strangers or addressing people such as teachers and doctors, in formal business meetings, etc. The second is used with friends and family.

I learned a little Spanish while living in Mexico for a couple of years. I once made the mistake (after knowing her for several months) of addressing my girlfriend’s mother using the “usted” form and it was a very big deal … seems she thought it meant I didn’t think of her as, uh, “close” or something … she was very upset.