title_body: Has anyone tried learning and speaking Kesh?
upvoted_answer: I have the novel, but haven't yet read it, so can't say that I've tried learning Kesh.
  I used to (and may still) have the cassette tapes that came with some work about the Kesh. As I recall, it was recordings very much as you describe for the texts: songs and lore of various kinds. As I recall it was a pretty sounding language.  I think this is it.
  I think it's therefore safe to say sòmeone has tried to learn it! Well enough to record it, anyway!