noun

a particular form of a language which is peculiar to a specific region or social group.

the Lancashire dialect seemed like a foreign language

regional language,local language,local tongue,local speech,local parlance,variety of language,vernacular,patois,non-standard language,idiom,regionalisms,localisms,provincialisms,lingo,local lingo,-ese,-speak,acrolect,basilect,sociolect,idiolect