“Can Klingon be used in unofficial Star Trek films? Fans hope to make it so – – The creators of an unauthorized, crowdfunded Star Trek film are fighting with studio executives, saying the language exists independently and is fair to use” (The Guardian)

http://www.theguardian.com/culture/2016/apr/29/star-trek-fan-film-klingon-paramount-cbs-lawsuit

Excerpt:

Randazza argued that Klingon has escaped its creators thanks to the “thousands of people” who have made it “an actual living language”. Paramount could own a dictionary or dialogue from a script, he argued, but not a language used by Star Trek fans and others at conventions and colleges, in books and TV shows, and even during weddings.

“It would not take a Vulcan to explain their logic – even the Pakleds would know that nobody can ‘own’ a language,” Randazza wrote. Reaching back to the argument that no one can copyright a system of words, he called Paramount’s claim that no one speaks Klingon “absurd”.