Suppose you're in a situation where you have a formal/business relationship with someone, but the relationship has become more familiar over time. The other person continues to call you usted. How ...
In English polite form of address is "You" which is second person singular and plural. In Russian it is "Вы" which is plural second person. In Spanish (and probably French and Italian) polite address ...
What is the etymology of the pronoun "usted"? What formal pronouns existed before, and when did the current "usted" come into existence?