Examples from the Web for dialectal
Literary style except in Southern Leyte and Bohol where it is colloquial (with the dialectal prefix a- substituting for paga-).A Dictionary of Cebuano Visayan|John U. Wolff
They must certainly have been looked upon, at the first, as being rustic or dialectal.English Dialects From the Eighth Century to the Present Day|Walter W. Skeat
The word is a compound of inter, between, and lope, a dialectal variant of “leap.”
The Middle English was pre-eminently the Dialectal period of the language.
Some of them probably heard the jests at the expense of their dialectal peculiarities which Plautus introduced into his comedies.The Common People of Ancient Rome|Frank Frost Abbott