patois

noun5

1. •
   A regional dialect (usually one considered nonstandard) of a language (especially French).

   • [The Sundanese] are regarded as relatively barbarous, and in the company of Malays or Javanese, they are themselves ashamed of their dialect, which is looked on as a sort of rude patois. — 1890
2. •
   Any of various French, Franco-Provençal or Occitan dialects spoken in France.
3. •
   Creole French in the Caribbean (especially in Dominica, St. Lucia, Trinidad and Tobago, and Haiti).
4. •
   Ellipsis of Jamaican Patois.
5. •
   Jargon or cant.

   • In the patois of insurance, the winery will go bare into this year’s burning season, which experts predict to be especially fierce. — 2021