How Attached to Japan is Patty?
Patty spent quite some time learning Japanese and is pretty much fluent. I think she missed some idioms here and there, but given that by definition those are phrases that don't use their literal meaning, that is understandable.
She is into anime and many of the same things Konata is interested in. The author Kagami Yoshimizu even mentioned that Patty has "the wrong idea on Japanese culture" because she thinks her friends are representative.
I was reading a draft of a fanfic where their entire hometown was summoned to another world. But this isekai was one where they were strangers in a familiar land. It was a world very much like their own, except the internet was never created and natural hair colors were limited to black, blond, red, brown, white, and so on but lacking blue, purple, and green. Some people who existed in their world like Emperor Akihito and Aya Hirano also exist in their destination world, but others did not. A lot of the jokes were at Konata's expense since many of her hobbies got invalidated.
The Japanese government just integrated most of the town and treated it like thousands of extra people they "forgot" to record births of.
Unlike most of the Japanese cast who had their extended families moved to the alternate world, Patty only had her immediate family who were visiting her. When they tried to go to America and see what happened there in this world, an INS officer (since those things I guess exist in this world) initially blocked them because there was no record of their existence before giving them a fictional visa.
In this case, Patty is sort of caught between two worlds. Everyone she knows in America besides her immediate family are gone. Most of the people she knows are Japanese, but as the author mentioned her idea of what Japanese culture has come from her immediate friend circle.
I know it is silly to try to predict a fanfic from canon since fanfic authors do whatever they want. But I was a bit curious. Given what we know of canon Patty, would she try to go full native?