Quechua, usually called Runasimi ("people's language") in Quechuan languages, is an indigenous language family spoken by the Quechua peoples, primarily living in the Peruvian Andes and highlands of South America. Derived from a common ancestral language, it is the most widely spoken language family of indigenous peoples of the Americas, with a total of probably some 8–10 million speakers. Approximately 25% (7.7 million) of Peruvians speak a Quechuan language. It is perhaps most widely known for being the main language family of the Inca Empire. The Spanish colonizers initially encouraged its use, but from the middle of their reign, they suppressed it. However, Quechua ultimately survived and variants are still widely spoken today.

More Info: en.wikipedia.org