Thedra is the oldest language in the world. It was gifted to the Gentle Races by the Creator at the beginning of time. However, seeing that the language became corrupted in the tongues of the other races, the Elves of Old Durum decided that they would ossify the language, unchanged forever. Outside of the Kingdoms of the Elves, the language did change and transform into dialects, and eventually into their own languages entirely. Regardless, Thedra remains the language of Politics, Art and Culture in much of Ficcius and Kadatran.
Obviously, Thedra is not a "real" language. It is a conlang (constructed language). Here, you will be able to find some information that will help you understand the language to some degree. Unfortunately, my hard-drive was recently whiped clean, so I am going to have to start working on it again from scratch.