The Collaborative International Dictionary of English v.0.48:

Parlance \Par"lance\ (p[aum]r"lans), n. [OF., fr. F. parler to
   speak. See Parley.]
   Conversation; discourse; talk; diction; phrase; as, in legal
   parlance; in common parlance.
   [1913 Webster]

         A hate of gossip parlance and of sway.   --Tennyson.
   [1913 Webster] Parlando

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "parlance":
   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