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In an older version of J.R.R. Tolkien's conception of the Languages of Middle-earth as expounded in the Lhammas, Melkian (also known as Orquin or Orquian) is the language which was named after the fallen Vala Melkor (Morgoth). It had its origins from corrupted Valarin. It was spoken by him and his servants and is the predecessor of many of the dialects of Orcs and other evil beings.
This concept was later dropped.
 See also