As I recall, even before Rowling became super-toxic (or at least before the public was aware of her toxicity) she was very protective of her world, and wouldn't let others expand on it. I have a vague memory of Hasbro licensing Harry Potter back in the 00s and mentioning "role playing" in the press release, only to clarify a few days after that this was role playing in the sense of costumes and props, not RPGs, because Rowling wouldn't let anyone make an RPG where they could put words in her characters' mouths or expand on the world.
That's unfair. There's only one character with a broad accent, the policeman who's a British spy and speaks in a French accent to signify that his French is bad. The comedy mainly derives from catchphrases, sexism, and a bit of homophobia thrown in for spice. And how, for some reason, every androphile on the show finds this man extremely attractive:
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