What about the reverse: have they sued anyone over the use of just the language? Is it possibly defacto public domain?And it seems unlikely that anyone will spend thousands in legal fees to challenge the copyright so legal or not, they have a defacto copyright.
You would have to be a die-hard, Star Trek fan to recognize how to spell in Klingon - so IMHO it would be copyright infringement.
But you better check with an attorney who is skilled in intergalactic law to make sure - good luck, and live long and prosper
Fair enough... in that case, I think things are thoroughly in their favour. While the whole "Can you copyright a fictional language?" thing is an interesting question, I'm guessing the answer is just "Yes."
The biggest factor in the book was the definitions or whatever they are were EXACTLY as they were in the books. There was no variations or his own wordings.J. K. Rowling is or was suing a small publishing company for creating the Harry Potter Lexicon book.