Oro Win is a moribund Chapacuran language spoken along the upper stretches of the Pacaás Novos River in Brazil.
As of 2010, there were only six known speakers of Oro Win in Brazil, and all of them were over 50 years of age.
[3] Oro Win is one of only five languages known to make use of a voiceless bilabially post-trilled dental stop, [t͡ʙ̥].
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