Star Trek is the source of the Klingon Empire.
The Klingons ( [ ˈklɪŋ.ɒn ] or [ ˈklɪn.ɡɒn ] ; Klingon : tlhIngan [ - artˈt͡ɬɪ.ŋɑn ] ) are a fictional extraterrestrial humanoid warrior species in the science fiction franchise Star Trek . In the fictional Star Trek universe the Klingon High Council ( in Klingon tlhIngan yejquv ) is the supreme ruling body of the Klingon Empire . Star Trek . The series has its own full-fledged constructed language , Klingon .