This is a fictional language.
This article covers a fictional language, and does not exist in the real world.
Klingon is a fictional language made by Marc Okrand, James Dooohan and Jon Povill. The language was made for the Klingon people of Star Trek. Klingon is a fairly used out language for Star Trek, as one episode is just all Klingon, the only English part is when the narrator speaks.