TUTORIAL: How to write in Elvish. This is the most detailed and thorough I've seen. Also, check out a lovely book called "The Languages of Tolkien's Middle Earth". It explains elvish (Sindarian and Quenya), Dwarvish, and others. Written by Ruth S.
Khuzdul (IPA: [kʰuzdul]) is the language of the Dwarves in J. Tolkien's Middle-earth, written with Cirth script. Not much is known of the language, as the Dwarves kept it to themselves, except for their battle-cry: Baruk Khazâd!