The Klingon language (tlhIngan Hol, pronounced /ˈt͡ɬɪ.ŋɑn xol/) is the constructed language spoken by the fictional Klingons in the Star Trek universe.Described in the 1985 book The Klingon Dictionary by Marc Okrand and deliberately designed to sound "alien", it has a number of typologically uncommon features. The language's basic sound, along with a few words, was first devised by actor James Doohan ("Scotty") for Star Trek: The Motion Picture.