Is Spain the only country that uses vosotros for you all (informal) instead of ustedes? (In the second-person perspective). Examples: Spain: Vosotros sois inteligentes. Other (?): Ustedes ...
How did the vos personal pronoun come to be? Is it etymologically related to vosotros in any way? Did it develop before or after the other personal pronouns used today (tú, usted, vosotros, etc)? Was ...