The quality of being provincial; having provincial tastes, mentality, manners.The blacksmith's provincialism showed in his speech and manner
(linguistics) A word or locution characteristic of a region or district.
1875, Andrew Dousa Hepburn, Manual of English Rhetoric, New York: American Book Company, p 79:Prose is allowed less liberty in this respect; but no one nowadays would maintain that the adoption of a provincialism into the literary dialect is absolutely prohibited.