You can get married in Klingon, use Google in Klingon, and even stage Hamlet in Klingon. But can you copyright Klingon? CBS and Paramount seem to think so, and they're suing a fan film that makes use of the language, first invented in 1984 for "Star Trek."
Now, a group of linguists is stepping into the legal fight, arguing that Klingon, and other "constructed languages," are real, living forms of communication exempt from copyright law. Their amicus brief is, of course, partly in Klingon.