Chiquitano (also Bésɨro or Tarapecosi) is an indigenous language isolate spoken in the central region of Santa Cruz Department of eastern Bolivia and the state of Mato Grosso in Brazil.

Joseph Greenberg linked it to the Macro-Jê languages in his proposal,[2] but the results of his study have been later questioned due to methodological flaws.

[7] Mason (1950) lists:[8] According to Čestmír Loukotka (1968), dialects were Tao (Yúnkarirsh), Piñoco, Penoqui, Kusikia, Manasi, San Simoniano, Churapa.

[1] In Brazil, Chiquitano is spoken in the municipalities of Cáceres, Porto Esperidião, Pontes e Lacerda, and Vila Bela da Santíssima Trindade in the state of Mato Grosso.

[18] Chiquitano has regressive assimilation triggered by nasal nuclei / ɨ̃ ĩ ũ õ ã ẽ/ and targeting consonant onsets within a morpheme.