good question, they don't mention it anywhere in the video's i've seen, and i don't think they would....
maybe you should send an email to Corrie (i forget his last name...) and find out from him :p
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D