Wichí Lhamtés Güisnay had an estimated 15,000 speakers in 1999 in Argentina.
The language is centered in the Pilcomayo River region.
[1] The Wichí languages are predominantly suffixing and polysynthetic; verbal words have between 2 and 15 morphemes.
The phonological inventory is large, with simple, glottalized and aspirated stops and sonorants.
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