>Paramount claims copyright ownership of Klingon
Well, sorta. Not according to the Language Creation Society! From the fallout of the case where Paramount/CBS sued the Axenar guys for the temerity to make a fan film without paying them for it comes this Washington Post opinion [0] (I've added the links found in the text at [1] and [2]):
>It seemed a stretch to suggest that the plaintiffs were claiming copyright in the Klingon language itself, and the court agreed, taking the somewhat unusual step of denying LCS’s motion to file its brief [1], on the grounds that the court didn’t have to “reach the issue of whether languages, and specifically the Klingon language, are copyrightable” in ruling on the case.
>The LCS has declared victory — at least to the extent that the final ruling in the case will not hold that the Klingon language is protected by copyright. Its statement — with a translation into Klingon, for those of you who read Klingon — is posted here [2].
The situation doesn't seem as rosy as the LCS' statement suggests, but as a consequence, I feel comfortable in claiming that Paramount does not currently, successfully, claim copyright ownership of Klingon. That said, "not getting sued by Paramount in future" is a pretty good reason for Unicode to exclude anything.
Tengwar, the script used to write Quenya and Sindarin, however...
[0] https://www.washingtonpost.com/news/volokh-conspiracy/wp/201...
[1] https://drive.google.com/file/d/0BzmetJxi-p0VN0t5MWNPOTZ4SU0...
[2] https://conlang.org/axanar/#updates