The Collaborative International Dictionary of English v.0.48:

Languet \Lan"guet\, n. [F. languette, dim. of langue tongue, L.
   lingua.]
   1. Anything resembling the tongue in form or office; specif.,
      the slip of metal in an organ pipe which turns the current
      of air toward its mouth.
      [1913 Webster]

   2. That part of the hilt, in certain kinds of swords, which
      overlaps the scabbard.
      [1913 Webster]