vernacular

noun 

/vəˈnæk.jʊ.lər//vɚˈnæk.jə.lɚ/ [C usually singular]

Definition

the form of a language that a regional or other group of speakers use naturally, especially in informal situations

The French I learned at school is very different from the local vernacular of the village where I'm now living.

Many Roman Catholics regret the replacing of the Latin mass by thevernacular.

•

specialized in architecture, a local style in which ordinary houses are built

•

specialized dance, music, art, etc. that is in a style liked or performed by ordinary people

vernacular adjective 

His lively vernacular style goes down well with younger viewers.

old stone vernacular buildings

Vernacular literature is literature written in the vernacular—the speech of the "common people".

In the European tradition, this effectively means literature not written in Latin.