I haven't got a clue, to be frank. Grendel wasn't even supposed to sound the way he does now. It somehow just happened. I do watch the Simpsons occasionally, but only the dubbed version and only if I happen to be at home and zapping around at the right time. I've seen a few episodes with "Tingeltangel-Bob" as he is called here but I can't really remember the way he spoke.

It's eerily fitting, though, since Grendel will turn out to be rather manipulative and masterminding quite a bit about the prophecy. :) unless my plot decides to take on a life of its own and get rid of that particular twist