[A month before the Fog God unleashes her wrath upon him. Provided that she even knows he exists here. If one were to assume she was responsible for his arrival, then he'd say there's a pretty good chance she was aware.]

Oh, you needn't-

[Hythlodaeus was not intent on ordering any food, but the hospitality was welcome. How much he could eat in his current mental state, however, was still to be seen. He abandons his protest, folding his hands in his lap and trying to scrape the dirt from his nails.]

Hm, I'm afraid that, if any of those places did exist on my star, I have been unfortunate enough to not have heard them spoken of previously.

[Hythlodaeus wasn't an expert on geography, either, but he would have liked to think that he would at least have heard of one out of the three regions that were just named to him. It leads him to conclude that perhaps they were not from the same world at all. Stranger things have been posited. He drifts in thought for a bit, holding his chin out of habit.]

It would lend credence to your assertion that we are all of different realms...