Xoco
Xoco was an unclassified language once spoken in Brazil.
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Xokó (Chocó, Shokó, Ceococe) is an extinct and poorly attested language of Brazil that is not known to be related to other languages. It has been classified as being related to Natú, which was spoken nearby.
It was originally spoken along the Piancó River is an area that is now a suburb of Porto Real do Colégio.
From Wikipedia · Xokó language · CC BY-SA 4.0