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Loukotka (1968) lists Arikapú and Maxubí as separate languages. Arikapú is spoken on the Branco River south of the Tuparí tribe. Maxubí is spoken on the Mequéns River.
Speakers
In 1998, Arikapú was spoken by only six individuals in Rondônia, Brazil, at the headwaters of the Rio Branco. By 2015, Djeoromitxi (2015) reported there were only two remaining speakers, namely the two sisters Nazaré Wadjidjika Arikapu and Nambuika Arikapu. It is being supplanted by Portuguese.
Phonology
Arikapú alphabet
a
ä
b
d
dj
e
h
i
ï
k
'
m
n
o
p
r
t
tx
u
ü
y
w
Nasalisation is indicated by a tilde on the vowel : ⟨ã ä̃ ẽ ĩ õ ũ⟩.
Djeoromitxi, A. K. O fortalecimento da língua e cultura Djeromitxi a partir da for-mação dos professores. 2015. 79 f. Monografia (Licenciatura em Educação Básica Intercultu-ral) – Departamento de Educação Intercultural, Universidade Federal de Rondônia (câmpus de Ji-Paraná). 2015.
Lev, Michael; Stark, Tammy; Chang, Will (2012). "Phonological inventory of Arikapú". The South American Phonological Inventory Database (version 1.1.3 ed.). Berkeley: University of California: Survey of California and Other Indian Languages Digital Resource.
Arikapú is classified as Critically Endangered by the UNESCO Atlas of the World's Languages in Danger