As the legal battle between Paramount/CBS and the producers of the fan-film Axanar slogs on, an interesting amicus brief was filed in court by the Language Creation Society about whether or not the Klingon language should be subject to copyright protections.
For full details, read the article at the World Intellectual Property Review website.
I suppose it is kind of silly to claim copyright to a constructed language. After all, the only point of creating a language is to have people use it, and that would seem to override any claim of copyright.
But, again, I’m no lawyer, so…