Katawixi language
Katawixi (Catawishi) is a Katukinian language formerly spoken in Amazonas, Brazil. It is nearly extinct among the known populations of Katawixi people, though an uncontacted group nearby may be Katawixi-speaking (Queixalós & Anjos G.S. 2007:29, cited in Hammarström 2010:194).
References
1 2 Katawixi at Ethnologue (18th ed., 2015)
↑ Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2013). "Katawixi". Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology.
↑ Harald Hammarström, 2010, 'The status of the least documented language families in the world'. In Language Documentation & Conservation, v 4, p 183