Parlance

(n.) A particular manner of speech; diction; as, in legal parlance.

Thesaurus Entries

choice of words, composition, dialect, diction, expression, formulation, grammar, idiom, jargon, language, langue, lingo, lingua, locution, parole, personal usage, phrase, phraseology, phrasing, rhetoric, speech, talk, tongue, usage, use of words, usus loquendi, verbiage, wordage, wording