A language familiar to a group of people.
[n] the style of a particular artist or school or movement; "an imaginative orchestral idiom"
[n] a manner of speaking that is natural to native speakers of a language
[n] an expression whose meanings cannot be inferred from the meanings of the words that make it up
[n] the usage or vocabulary that is characteristic of a specific group of people; "the immigrants spoke an odd dialect of English"; "he has a strong German accent"
Ya'll comin' to da party tonight?