title_body: Are constructed languages intellectual property? Do they ever stop being IP, once people use them?
upvoted_answer: The short answer is that there are no mechanisms in place by which one could credibly copyright, patent or otherwise secure ones language. Works you create about the language (such as a grammar document or a poem) of course fall under the same copyright laws as any other works of their kind and as such generally belong to you, but your language as of now is just as copyrightable as English.
  
  For a long answer, I recommend watching this talk by Sai (founder of the LCS) about exactly this topic.