tlhIngan Hol is the constructed language of the Klingon species from the Star Trek franchise. Developed by linguist Marc Okrand, it features a unique grammar and vocabulary that reflect the culture and values of the Klingons, emphasizing honor and warrior traditions. The language is known for its guttural sounds and complex sentence structures. It has gained popularity among fans, leading to the creation of dictionaries, translation guides, and even Klingon language courses. tlhIngan Hol is often used in Star Trek media, including films, television series, and novels, showcasing its significance in the franchise's lore.