According to recent oral memory narratives,[6] in ancient times, they inhabited territories around the current Brazilian margin of the Uruguay River.

The language, which Blas learned from his ancestors, was considered extinct before he was interviewed by the linguist José Pedro Viegas Barros.

[14] The following are the phonemes of the Chaná language:[15][16] "Lanték" has been recognized as a part of the "Cultural Heritage of the Entre Ríos Province."

[17] The publication contained a dictionary compiled via Don Blas Wilfredo Omar Jaime and an encyclopedic study of Chaná culture.

A great deal of Chaná ethnoliterature was obtained during elicitation sessions with Viegas Barros during the seven years prior to the publication of the volume.