Nivaclé is a Matacoan language spoken in 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...

 by c.8,400 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...

 by 200. It is also known as Chulupí and Ashluslay, and in older sources has been called Ashuslé, Suhin, Sujín, Chunupí, Churupí, Choropí, and other variant spellings of these names. Nivaclé speakers are found in the Chaco, in Paraguay in Presidente Hayes Department

Presidente Hayes Department

Presidente Hayes is a department in Paraguay. The capital is the city of Villa Hayes. The department was named after U.S. President Rutherford B. Hayes, who was the arbitrator in a boundary dispute between Paraguay and Argentina after the War of the Triple Alliance.-Districts:The department is...

, and Boquerón Department

Boquerón Department

Boquerón is a department in the western region of Paraguay. It is the country's largest department, with an area of , but its population is only 45,617 . The department includes the Russian Mennonite colonies of Fernheim, Menno and its administrative center Loma Plata and Neuland. The capital is...

, and in Argentina 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...

.