to attempt a reconstruction. Het was the language spoken by the original dwellers of the Pampas, known as Pampas or Querandíes, before they became intermixed with peoples of Mapuche origin and progressively switched to Mapudungun. Its very existence as a unique language (by opposition to a group) is merely speculative. Allentiac or Alyentiyak and Millcayac or Milykayak languages belonged to the Huarpe or Warpe family and were spoken in the Cuyo region in central-western Argentina. The scarcity of remaining elements prevents accurate classification or reconstruction. Lule, supposed to be part of the Lule–Vilela family, was spoken by peoples living in today's Salta Tucumán and Santiago del Estero provinces. Only a few toponyms and names remain, but their precise meaning is often obscure. However, the language is fairly well documented in a vocabulary and grammar composed by the Jesuit Antonio Machoni in 1732. Tonocoté, sometimes confused with Lule, was spoken by a settled people dwelling in western and central regions of today's Santiago del Estero Province. There is some speculation among scholars about the possible Arawakan origin of that ethnic group, while other sources state that they were switching to Quechua in the 16th century. No evidence of the language has survived. Yaghan, Yámana, Háusi-Kúta or Yagán is a language spoken by indigenous peoples of southern shores and islands of Tierra del Fuego. A very analytical language, it had an extensive vocabulary. In Argentina Yaghan became extinct at the beginning of the 20th century, but lexicons and early recordings remain. It is recognised in a number of well known toponyms as Ushuaia, Lapataia, Tolhuin, etc. Some elder speakers (between 1 and 5) remain in Chile, where the language is nearly extinct. Ona. Puelche. Tehuelche language. Vilela language. Other extinct languages are known just by the ethnic group that spoke them, since very scarce (if any) linguistic material remains. Among them: Omaguaca; Sanavirón; several languages probably belonging to the Guaycurú family but known by their Guaraní ethnonyms as Mbayá, Payaguá, Minuané, Mbeguá, Timbú, Corondá, Quiloazá and Colastiné; and others related to the Chon stock, as Manek'enk and Teushen. See also List of indigenous languages of South America References Adelaar, Willem F.H. (2004). The languages of the Andes. Cambridge: Cambridge University Press Braunstein, José A. (1992-3A). Presentación: esquema provisorio de las tribus chaqueñas. Hacia una Nueva Carta Étnica del Gran Chaco, 4: 1-8. Las Lomitas, Formosa. __ (1992-3B). Presentación. Hacia una Nueva Carta