Related question: Did English ever have a formal version of "you"?
In Portuguese (and probably other languages as well), similar to what happens with the second-person, there are two words for "we": "nós" (formal) and "a gente" (informal, only used in colloquial speech). Both pronouns have the same meaning: they refer to the person who is talking and can include the hearer and/or other people.
Did English ever have this feature?