Klingon is sooooo close!
What is your opinion on klingon?
Well, this is only my opinion, and I could be wrong;
They say Klingon is a fully developed language, but I am not sure about that. I have the tentation of studying it. but these reasons make me not studying it:
What I like of the klingon is that it has a lot of strange sounds, but it is really difficult to understand how to pronounce them, and even more if you don't have any Klingon speaker teacher with patience to teach you.
Its alphabet is fine and a great idea, I have not problem with that.
As it suposed to be an Alien language, its words are not related to any language, so it will require a considerable effort, a lot of time and practice to learn them.
And about the immersion aspect, no comments about that. But Klingon is a language that I would study if I had enough motivation.