Eastern Bolivian Guaraní, known locally as Chawuncu or Chiriguano (pejorative), is a Guaraní language spoken in South America. In Bolivia 33,670 speakers, called the Ava Guaraní people were counted in the year 2000, in the south-central Parapeti River area and in the city of Tarija. In Argentina, there were approximately 15,000 speakers, mostly in Jujuy, but also in Salta Province, and 304 counted in the Paraguayan Chaco.
Avá (Chané, Tapieté) and Izoceño are dialects.
The languages of Bolivia include Spanish and several dozen indigenous languages, most prominently Aymara, Quechua, Chiquitano, Guaraní and the Bolivian Sign Language (closely related to the American Sign Language). Indigenous languages and Spanish are official languages of the state according to the 2009 Constitution. The constitution says that all indigenous languages are official, listing 36 specific indigenous languages, of which some are extinct. Spanish and Quechua are spoken primarily in the Andes region, Aymara is mainly spoken in the Altiplano around Lake Titicaca, Chiquitano is spoken in the central part of Santa Cruz department, and Guarani is spoken in the southeast on the border with Paraguay and Argentina.