There's fan-fiction and role-playing stuff out there, noting that one of the sites now linked from the thread explains:
Quote:
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While Tolkien created only a few words in Black Speech, fans and roleplayers have created their own dialects. One of the most famous dialects for English speakers is the LOS (Shadowlandian) Dialect, created by Scatha. In Europe, a major dialect for Swedish speakers is Svartiska.
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In any event I recommend:
http://www.elvish.org/
And the article (under link 'Articles')
Elvish as She Is Spoke and also the FAQ. One can link to ELM from here as well.