For ten points, what is this language, whose modern version is spoken by more than half the people of Peru, which was the administrative and commercial tongue of the Incan empire?
It is the name of the language of an ancient empire, a modern language, and a linguistic family which still has more than 2 dozen languages in use. It belongs to the Andean branch of the Andean-Equatorial stock of languages. For ten points, what is this language, whose modern version is spoken by more than half the people of Peru, which was the administrative and commercial tongue of the Incan empire?
It is the name of the language of an ancient empire, a modern language, and a linguistic family which still has more than 2 dozen languages in use.
{Quechua} or {Kechua} or {Quichua}