Definition of vernaculars:
(n) :
The language of a people or a national language.
(n) :
Everyday speech or dialect, including colloquialisms, as opposed to standard, literary, liturgical, or scientific idiom.
(n) :
Language unique to a particular group of people.
(n) :
Indigenous spoken language, as distinct from a literary or liturgical language such as Ecclesiastical Latin.
(adj) :
Of or pertaining to everyday language, as opposed to standard, literary, liturgical, or scientific idiom.
(n) :
A language lacking standardization or a written form.