Yeah, but ... it's fake

[Hookbill the Goomba]

The fact that the language is fake, or unreal, is not important, I do not think. Certainly Tolkien didn't think that it was an important factor. When regarding his mythology as a whole, anyway, one can always make the argument, "Its fake! Ye fakey fakes!" but I think the good professor can speak for himself. As he says in his essay 'On Fairy Tales'...

Originally Posted by THE PROFESSOR!

But at no time can I remember that the enjoyment of a story was dependant on the belief that such things happen, or had happened in 'real life'. Fairy stories are plainly not primarily concerned with possibility, but with desirability. If they awaken desire, satisfying it while often whetting it unbearably, they succeeded.

I think the same is true of the Elvish language. If Tolkien has awoken a desire to learn the language of the Elves, he has succeeded. A round of applause is in order, I think.