Eastern Bolivian Guaraní, known locally as Chawuncu or Chiriguano, is a Guaraní language

Guaraní languages

The Guaraní languages are a group of half a dozen or so languages in the Tupí–Guaraní language family. The best known language in this family is Guaraní, the national language of Paraguay.The Guaraní languages are:...

 spoken in South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

. In Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

 33,670 speakers were counted in the year 2000, in the south-central Parapeti River

Parapetí River

-References:*Rand McNally, The New International Atlas, 1993....

 area and in the city of Tarija

Tarija, Bolivia

Tarija or San Bernardo de la Frontera de Tarixa is a city in southern Bolivia. Founded in 1574, Tarija is both the capital and largest city within the Tarija Department, with an airport offering regular service to primary Bolivian cities, as well as a regional bus terminal with domestic and...

. In Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

, there were approximately 15,000 speakers, mostly in Jujuy

Jujuy Province

Jujuy is a province of Argentina, located in the extreme northwest of the country, at the borders with Chile and Bolivia. The only neighboring Argentine province is Salta to the east and south.-History:...

, but also in Salta Province

Salta Province

Salta is a province of Argentina, located in the northwest of the country. Neighboring provinces are from the east clockwise Formosa, Chaco, Santiago del Estero, Tucumán and Catamarca. It also surrounds Jujuy...

, and 304 counted in the Paraguay

Paraguay

Paraguay , officially the Republic of Paraguay , is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to the east and northeast, and Bolivia to the northwest. Paraguay lies on both banks of the Paraguay River, which runs through the center of the...

an Chaco

Chaco Department

The Paraguayan Chaco or Región Occidental is a semi-arid region in Paraguay, with a very low population density.The Chaco is a large geographic area that is sparsely populated. Many of those living in the region are native peoples...

.

Avá (Chané, Tapieté

Tapieté

Tapieté is a subdialect of Eastern Bolivian Guaraní spoken by 33 Paraguayans , 100 Argentines, and 70 Bolivians. It is also known as Guasurango, Guasurangue, Tirumbae, Yanaigua, Ñanagua, and Nandeva....

) and Izoceño are dialects.

In Argentina it is known as Western Argentine Guaraní, while in Paraguay it is locally known as Ñandeva. (However, outside of Paraguay and specifically in Brazil, Nhandeva refers to Chiripá Guaraní.)

Eastern Bolivian Guaraní is one of a number of "Guaraní dialects" sometimes considered distinct languages. Of these, Paraguayan Guaraní is by far the most important variety and it is often referred to simply as Guaraní.