In 2005, a semi-speaker of the Chaná language, Blas Wilfredo Omar Jaime, was found in Entre Ríos Province, Argentina.

[2] Nikulin notes that many of the following languages share very few basic vocabulary items with each other.

Four languages are considered to definitively belong to the Charruan language family, basically Chañá (Lanték), Nbeuá, Charrúa and Guenoa.

[5] A number of unattested languages are also presumed to belong to the Charruan family:[5] Jorge Suárez includes Charruan with Guaicuruan in a hypothetical Waikuru-Charrúa stock.

Morris Swadesh includes Charruan along with Guaicuruan, Matacoan, and Mascoyan within his Macro-Mapuche stock.