It is usually classified as one of the Guaicuruan languages, but the data is insufficient to demonstrate that.
[4] An automated computational analysis (ASJP 4) by Müller et al. (2013)[5] found lexical similarities between Payagua and the Chonan languages.
However, since the analysis was automatically generated, the grouping could be either due to mutual lexical borrowing, genetic inheritance, or chance resemblances.
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