You know what you're not allowed to say tv di Angelo siblings shouldn't have accents because "it's never mentioned/pointed out in the books that they do" because you know what it may have been a few years but as I recall NOBODY'S accent is ever called attention to in the damn books despite the fact that campers come from all over the states.
In HOO alone the Seven include: two New Yorkers, two kids from California, a Texan, a Louisianan, and a Canadian - though to be fair I don't remember at what age Frank leaves Canada and/or arrives in New Rome.
My point is I don't remember a single one of the Seven ever mentioning/commenting on anyone else's accent despite the fact that they should all have very different accents.
The Lotus Hotel i will give you makes it debatable but because time moves differently inside the hotel vs in the rest of the world, yeah they were in there for like ~70-ish? years but they experienced it as like a couple of months, so I personally don't think it would have affected their accents much.
At very least they should have like weird Venician/Vegas mash accents if not strait Venician.
