I say it the way it's spelled, why would you think otherwise? Split it into two syllables: Graal=Gra-al or Gr-aal. I don't see any reference to the "ail" or "ale" pronouncation in there at all, unless you see the two a's giving it a long "ay" sound, but I see it as an "ah" sound. But why would you name it graal instead of grail to avoid confusion? (I know that some references spell grail as graal, but still, the more common is grail
) Even if classic dealt with grails, that doesn't mean that that's the way the name of the game is meant to be pronounced, but who am I to say? It's really up to Stefan, I personally can't remember what he said about the pronouncation. But does it really matter?