Where did you get reference material to translate the individual letters to Dwarvish? Every book I own and Images I have found online say that the Runes correlate with different letters and numbers than the keyboard shows.
Edit: It wont let me post the link to wiki about Cirth, but feel free to look for yourselves.
The enter key is the inscription on Balin's tomb, "Balin son of Fundin, lord of Moria." While the space bar is a dwarven battlecry used by Gimli and Balin, "The Axes of the Dwarves! The Dwarves are upon you!"