User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/The Cup of Life!/@comment-4190137-20120405031224/@comment-4650675-20120405110615

Hmm, probably because it is linked to religious issues and mostly Christianism. The show avoids mentioning religions, christianism(represented by Arthur and Uther) has never been mentioned and neither has paganism (represented by Morgana, Morgause, Nimueh e.t.c.), so they renamed it. Alternatively, because that's their way of doing things, I guess...