vernacular

nouns

a characteristic language of a particular group (as among thieves)
"they don't speak our lingo"
argot, cant, jargon, lingo, patois, slang, vernacular
the everyday speech of the people (as distinguished from literary language)
vernacular
is a type of (narrower)
speech that differs from the usual accepted, easily recognizable speech of native adult members of a speech community
non-standard speech

adjectives

being or characteristic of or appropriate to everyday language
"common parlance"; "a vernacular term"; "vernacular speakers"; "the vulgar tongue of the masses"; "the technical and vulgar names for an animal species"
common, vernacular, vulgar