How Well Do You Know English Slang?
1570s, "speaking, speech," especially in debate; 1787 as "way of speaking," from Anglo-French (c.1300) and Old French parlance, from Old French parlaunce, from parler "to speak" (see parley).
A concurrent language. ["Parallel Processing Structures: Languages, Schedules, and Performance Results", P.F. Reynolds, PhD Thesis, UT Austin 1979]. (1994-12-12)