Millcayac (Milykayak) was one of two known Warpean languages. It was native to Cuyo in Argentina, but was displaced to Chile in the late 16th century. Luis de Valdivia wrote a grammar, vocabulary and religious texts.Márquez Miranda, Fernando. 1943. Los textos Millcayac del P. Luis de Valdivia con su vocabulario español-Allentiac = Millcayac. ''Revista del Museo de la Plata (Nueva Série): Antropología'' II: 61-223. The people became

Mestizo (; ; fem. ) is a term used for racial classification to refer to a person of mixed European and Indigenous American ancestry. In certain regions such as Latin America, it may also refer to people who are culturally European even though thei ...

and lost their language soon after.

References

Huarpean languages Extinct languages of South America Languages of Argentina Languages of Chile Languages extinct in the 17th century {{na-lang-stub