Kryptonese
From superman.nu: Supermanica
The main language of the planet Krypton during its civilization's advanced stage. While at his Fortress of Solitude, Superman writes in his giant diary using the Kryptonese language in order to maintain his privacy (Act No.241/1, Jun 1958: "The Super-Key to Fort Superman!"; and others).
External Links
[1]Kryptonian Languages at Superman Through the Ages
[2]The Kryptonian Language Project
