dialect noun
Category: speech, language, and communication.
1626, Cockeram:
a difference of certaine words in a language: as heere in England, the North Dialect differs from the Southerne, and the Westerne Dialect differs from both of them.
1658, Phillips:
(Greek) a propriety of speech, or difference of pronunciation peculiar to each several Countrey, as in Greece heretofore were the Attick, Dorick, Ionick, and Aeolick Dialects, or Idiom's; it is also the art of locgick.