pa·tois /ˈpæˌtwɑ, ˈpɑ-/
  方言,行話
  Pa·tois n.  A dialect peculiar to the illiterate classes; a provincial form of speech.
     The jargon and patois of several provinces.   --Sir T. Browne.
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  patois
       n 1: a characteristic language of a particular group (as among
            thieves); "they don't speak our lingo" [syn: cant, jargon,
             slang, lingo, argot, vernacular]
       2: a regional dialect of a language (especially French);
          usually considered substandard