Thanks Jalicos, strangly I found a character for ir too. They might have had a Thorn (th) as well but had not used it yet.
But something I just came accross was that a Stardock Employee, Trent aka Mittens, just said that the runes in the corners are words as well. Unfortunatly I can not match them to any of the charaters I know. But I believe starting at the red one and going clockwise it is: Fire, (Magic or Element), Water, Earth, and Air. Of course I can't back that up.
But I must say that Paul Boyer, of Icon fame, did a great job on them, and I'm guessing the language as well.
Guess I'll have to wait for one of the great Stardock employes to confirm or contradict what I think.