Xakriabá language
Xakriabá (also written Chakriaba, Chikriaba, Shacriaba) is an extinct or dormant Akuwẽ (Central Jê) language (Jê, Macro-Jê) formerly spoken in Minas Gerais, Brazil by the Xakriabá people, who today speak Portuguese. The language is known through two short wordlists collected by Augustin Saint-Hilaire and Wilhelm Ludwig von Eschwege. The last confirmed native speaker of the language died in 1864. Phonology

Vowels 

 /i/ can also be heard as [ɪ] in shortened positions. Consonants 

 Sounds [j] is heard from /i/ before other vowels or within diphthongs. Sounds [ʃ ʒ] are heard as allophones of /s z/. Sounds [tʃ dʒ ɲ] are heard as allophones of /t d n/ when palatalized before /i/. [ɡ] can be heard as an allophone of /k/. History
Before 1712, Xakriabá was originally spoken along the São Francisco River near São Romão, Minas Gerais (Saint-Hilaire 2000: 340-341). The Xakriabá were then forced to migrate after being defeated by  and other Paulistas from 1690 onwards. In 1819, Saint-Hilaire (1975: 145) noted that the Xakriabá of Triângulo Mineiro region spoke a Xerente dialect. References

Jê languages
Extinct languages of South America
Languages of Brazil
Languages extinct in the 1860s