On Wowpedia it says that “The Sisterhood [of Elune] have a special language to commune with the lunar deity.” It cites The Sundering (page 259). I don’t own the novel, but I curious as to what the language is called, or anything about it, really. Thanks (:
It’s a beautiful wordless language that involves serene communition with the Moon Deity. It can be seen in action here: