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The Chaco linguistic area is a linguistic area that includes various South American language families and isolates of the Chaco region of South America, in southern Brazil, southeastern Bolivia, Paraguay, Uruguay, and Argentina.
Common Chaco areal features include SVO word order and active-stative verb alignment.[1]
Campbell and Grondona (2012) list the following languages as part of the Chaco linguistic area.[1]
Charruan is sometimes also included. Jorge Suárez includes Charruan with Guaicuruan in a hypothetical Waikuru-Charrúa stock. Morris Swadesh includes Charruan along with Guaicuruan, Matacoan, and Mascoyan within his Macro-Mapuche stock. Both proposals appear to be obsolete.
Jolkesky (2016) suggests that Trumai has lexical similarities with the Macro-Mataguayo-Guaykuru and Tupian language families.[2] These apparent similarities with the Macro-Mataguayo-Guaykuru languages and Tupi-Guarani languages suggest that Trumai had originated in the Paraguay River basin. The Trumai had only arrived in the Upper Xingu basin via the Culuene River during the 19th century (Villas Bôas & Villas Bôas 1970:27[3]).[2]: 426
The following language families of the Argentinian Pampas are also included in some classifications.
Linguistic features that are characteristic of the Chaco linguistic area include:[1]
Nikulin (2019) suggests a Macro-Chaco hypothesis linking Jê-Tupí-Cariban (including Karirian and Bororoan) with Mataco-Guaicuruan (possibly including Zamucoan):[4]