William Ronald
Explorer
This page on the Espruar font shows that there is no C in Espruar, so it looks like the Casin Cu Calas could easily be spelled in Common script with either the Thorass equivalent of C or K. (if you have the FRCS book, note that c is crossed out in the Espruar script.) So, an elf who would somehow know the English Alphabet might write the Casin Cu Calas as the Kasin Ku Kalas. (Oy vey, do these bad guys need to go down hard!)