Klingon Translator. Convert from English to Klingon. The Klingons are a fictional extraterrestrial humanoid warrior species in the science fiction franchise Star Trek. For the Star Trek: The Motion Picture(1979) the Klingons got a complete step up on the make up, effects and complete Klingon language. The Klingon language is the constructed language spoken by the Klingons in the Star Trek Universe.