Kryptonian

Recently happened across the Kryptonian Language Project: “an ongoing effort to flesh out a full working language for the home planet of one of the most popular fictional characters in history, Superman.”

There's a wealth of information on the site, from notes on pre-Crisis vs post-Crisis Kandorian to discussions of the alphabet and grammar, to an English/Kryptonian dictionary. Oh, yes, and you can download a Kryptonian font.