Wichí Lhamtés Güisnay orWiznay is aWichí language. Wichí Lhamtés Güisnay had an estimated 15,000 speakers in 1999 in Argentina. The language is centered in thePilcomayo River region. Other names for the language include Güisnay, Mataco, Mataco Güisnay, Mataco Pilcomayo, and Wichí Lhamtés. A grammar book has been written for the language.^[1]

The Wichí languages are predominantlysuffixing andpolysynthetic; verbal words have between 2 and 15 morphemes. Alienable and inalienablepossession is distinguished. The phonological inventory is large, with simple,glottalized andaspiratedstops andsonorants. The number ofvowels varies with the language (five or six).

• Aspirated sounds [pʰ,tʰ,kʰ~qʰ] only occur as allophones of /p,t,k/.
• /k,kʷ,kʼ/ can also have allophones of [q,qʷ,qʼ].
• /m,n/ can have allophones [m̥,n̥,n̥ʲ] word-medially, when occurring after /h/. [n̥ʲ] occurs when /i/ is preceding the sequence/nh/.
• /h/ can also be heard as [x] word-medially and word-finally.

• /a/ can have an allophone of [ɑ].

• Wichí Lhamtés Nocten
• Wichí Lhamtés Vejoz

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