Southern Quechua , or simply Quechua, is the most widely spoken of the major regional groupings of mutually intelligible dialects within the Quechua language family, with about 6.9 million speakers. It is also the most widely spoken indigenous language in the entire New World. The term Southern Quechua refers to the forms of Quechua spoken in regions of the Andes south of a line roughly east-west between the cities of Huancayo and Huancavelica in central Peru. It includes the Quechua varieties spoken in the regions of Ayacucho, Cuzco and Puno in Peru, in much of Bolivia and parts of north-west Argentina. The most widely spoken varieties are South Bolivian, Cuzco, Ayacucho, and Puno (Collao).