[re language copyrights]
I don't know about USA but just finished one big hunk of 'copyright' article
in HU: so I believe I'm pretty up to date on the European interpretation
(probably similar to international treaties) which explicitely does not
allow to copyright ideas, or anything which isn't "materialised". So the
toki pona or klingon website, books, recorded materials etc could be
copyrighted, but the languages themselves cannot.
(As a sidenote the Klingon font faces/glyphs probably cannot be copyrighted
either, just their actual representational forms, prints, etc.)
IANAL (but I have read the law recently :))
ps: ...which doesn't mean they're not protected by other laws, though.