Naolan

Naolan is an extinct and unclassified language that was spoken near Tula in the Mexican state of Tamaulipas, in the region linguists describe as the Coahuiltecan linguistic area, and is thought to represent the speech of the Pison people, though that connection is uncertain. The linguist Roberto J. Weitlaner recorded the only substantial documentation in 1948, gathering about 48 words and a few phrases from several remaining speakers before the language disappeared around 1950. Of that vocabulary, roughly six words derive from Spanish and several more appear borrowed from neighboring languages, leaving too little original material for the linguist Lyle Campbell or other scholars to establish any family relationship.