Template:Disabled language
"Its translation should be moved to ... translatewiki.net".... We are on translatewiki.net !
Translatewiki.net is not required to support only Wikimedia projects, it can support Wikia, where Klingon is accepted (but it uses a script that is not encoded in Unicode, only encoded in ISO 15924. The proposal to encode the Klingon script was made by Michael Everson at Unicode, and as it was rejected, Klingon is for now encoded in PUA space using the "ConScript PUA registry"... managed by Michael Everson which supports more languages than what ISO/IEC WG2 or the UTC want to support.
It was rejected simply on the fact that most Klingon users wrote it in the Latin script (but with several variants or transliterations, not always the one promoted by KLI, notably some users prefer using extended latin which more accurately represent the sounds, like c with hacek, small capital i, or l barred with curl, and then allow the script to be romanized with common dual casing, which makes it more readable).
There's nothing wrong in translating MediaWiki in Klingon even if there's no Wikimedia project for it. But Wikimedia wiki do not want to support languages written in scripts requiring the use of PUAs (nomally intended to be for private use, and then limited in scope to specific projects using it in their own community).
Also I'm not adding any new language, I'm just sorting what is existing on this wiki, and then display a correct status.