Proper noun
Auvergnat
An Occitan dialect spoken in Auvergne.
Smith, p. 119 In July of that year he and his wife went to the Auvergnat spa town of La Bourboule for a holiday. Source: Internet
The Bonnaudian norm (or écriture auvergnate unifiée, EAU) was created by Pierre Bonnaud and is used only in the Auvergnat dialect, besides the classical norm. Source: Internet