Kakán was the language of the Diaguita people, who came from the north of Argentina and populated the fertile Traversal Valleys.
Rodolfo Schüller's studies indicate that, in the areas where this language was spoken, it is totally extinguished.
Currently, some Kakan words are conserved in surnames and local toponyms (names of places), such as:
Places: Antofagasta, Chalingasta, Elqui, Sotaquí, Atacama, Calama, Toconao, Ticnamar, Combarbalá, etc.
Surnames: Alballay, Campillay, Sapiaín, Talinay, Chavilca, Tamango, etc.
Names of plants: Chañar, gualtata, chilca, yalipalqui, palqui, etc.