So let me run this idea past you, and you can tell me exactly how out of touch and crazy I might be, okay?
So we have five people, neighbors. They have one mutual magical task, containing/binding something suitably demonic/Lovecraftian. To that end, they take part in a regular binding ceremony. Each person has their own personal ritual to summon the necessary power for the ceremony, each one very personal to them. One person, for example, will clean their entire house and then must set a specific food to cooking on the stove; that food has to be actively cooking while the ceremony happens. This is because that food, and the preparation thereof, has some connection to their childhood, some meaningfulness to them. Another person might, oh, say, be required to put an AC/DC song on their stereo and jack it as high as it will go, strip down naked, and then air guitar through the entire song three times while lip syncing the lyrics; this is a re-enactment of some important event in their youth that, again, had some meaning/impact on them.
So where I think I'm going off: the youngest of the neighbors is just barely 19, a young Japanese American. 6 days a week, she's like every American girl you ever met, speaks English, dresses like a typical teenager, glued to her smart phone, eats McDonald's, etc. But her ritual is to put on a traditional Japanese outfit, and, from that point until the end of the ceremony, speaks nothing but Japanese.
I have no current intention of explaining why this ritual is meaningful to her, or to any of them. Discussion is off limits, to preserve the magic. Frankly, I have no idea why this is important to her, just that it is.
Next, and here's the goofy part. The ritual itself is laughter. They have to keep each other laughing for at least fifteen minutes. so what they do is gather in the designated space, and start telling each other the stinkiest dad jokes they can think of. Why dad jokes? God, who knows? They tried good jokes, no luck. They tried recordings of sitcoms. They tried professional stand up acts; that time they used a Robin Williams video nearly ended with Armageddon. It has to be them, it has to be just awful dad jokes, shaggy dog stories, horrendous puns, and the sort of incoherent dirty jokes you only hear from dedicated barflies at 10 o'clock on Monday mornings.
As for Japanese girl, she tells her jokes in Japanese. I will not be translating them into the text. Ideally, they will be written out in hiragana/kanji, so the reader can't understand them, either.
Here's the thing. The neighbors laugh at the jokes, no matter how bad they are. Genuine, "oh, my goodness, that's a funny one!" laughter, not just-to-be-polite laughter, complete with wheezing, sore ribs, and giggle-aftershocks. And while the neighbors do not understand one syllable of the Japanese jokes, they still "get" the jokes, and still genuinely laugh. In fact, as long as the ceremony is happening, everything the girl says will be in Japanese, nobody will understand a word, and yet every utterance will be comprehended and responded to appropriately. It's a side effect of the magic.
So what I'm worried about is...
1. Is this nuts? (the story cycle is comic fantasy, so slightly nuts is acceptable)
and
2. Am I culturally appropriating? I'm old, I live an extremely isolated lifestyle, so I don't entirely trust my radar on this question.