vernacular

[1]	slang , cant , jargon , lingo , argot , patois
[2]	jargon , patois , argot , cant , idiom , phraseology , language , talk , speech

adj.

[1]	native , local , regional , indigenous , autochthonous
[2]	popular , informal , (Colloq)uial , conversational , ordinary , familiar , everyday , spoken , vulgar , vulgate , plain , simple , straightforward , easy
[3]	common , vulgar