patois

As a noun patois

is a regional dialect of a language (especially french); usually considered substandard.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between patois and prose

is that patois is a regional dialect of a language (especially french); usually considered substandard while prose is language, particularly written language, not intended as poetry.

As a verb prose is

to write or repeat in a dull, tedious, or prosy way.

As nouns the difference between pathos and patois

is that pathos is pathos while patois is a regional dialect of a language (especially french); usually considered substandard.

As nouns the difference between patois and vernacular

is that patois is a regional dialect of a language (especially French); usually considered substandard while vernacular is the language of a people or a national language.

As an adjective vernacular is

of or pertaining to everyday language.

As nouns the difference between argot and patois

is that argot is a secret language or conventional slang peculiar to thieves, tramps and vagabonds while patois is a regional dialect of a language (especially French); usually considered substandard.

As nouns the difference between patis and patois

is that patis is a fish sauce, a byproduct of making bagoong, used as an ingredient or condiment in the Philippines while patois is a regional dialect of a language (especially French); usually considered substandard.