1. Languages are used for much, much more than communication, and there is good reason to think that capacity didn't evolve for communication, but rather for metacognitive problem solving.

2. The idea that Tolkein --one of the most reknowned writers in our entire canon-- did something isn't relevant to the philosophical discussion of creativity and its obvious bounds. Even Tolkein was just painting within the lines set by the linguists he had read and the obscure languages he adored, not to mention the fundamental limits set by our capacity for language in the first place.

For anyone who's curious about this kind of thing, I cannot reccomend the infamous debate b/w Chomsky & Foucault enough; it ranges across topics a bit, but chapter markers should help you skip to the core of it (creativity) if you prefer. Video here: https://www.youtube.com/watch?v=3wfNl2L0Gf8 , some old summaries on /r/AskPhilosophy here: https://www.reddit.com/r/askphilosophy/comments/vgz1vb/what_...