my friend and i came up with a bunch of cuisines for the various countries in naruto, though admittedly we’re quite asian-centric due to being well, asian. that being said, this is what we settled on:
Land of Fire, Konoha: pretty much Japan, with Japanese hegemony throughout the land, that’s why all the countries have Japanese-ish dress much like how American jeans spread throughout the world
Land of Wind, Suna: Spicy-hot bbq type food, with meat of choice goat/mutton, occasionally camel. Middle-east inspired type foods. I imagine they have that cool boiling coffee in sand thing too!
Land of Lightning, Kumo: with the fertile valleys around, food and veg is swiss-like, pork/meats sausages, with pickled vegetables and various hashes and imported herbs. Kumogakure tho, literally also has a lot more flying birds like geese and duck in the cuisine, so like smoked duck ramen.
Land of Water, Kiri: Russian/Norwegian type food, though heavy on the seafood stews, so a lot of fermented fish/meats, pickled vegetables. Very little greens. Water Country also has a basically protected method of preserving high value fish such as cod, such that they make boat loads of money exporting fresh fish all over, while other countries like Fire Country and Lightning, even if they have coast lines aren’t very good at sending fresh fish inland - so every other country capitals/inland cities, fresh fish are most likely from Water Country rather than from their own local coasts.
(Though thinking back and forth I found Kiri to be more similar to Indonesia and Philippines, if we’re being honest - but a heavy fish export and preservation makes sense too)
Earth Country, Iwa: Iwa mochi (crispy rice cake lol) . Mostly fertile lands, able to grow rice and other grains for export, so rice & noodles & wheat products, and own native herbs and spices that are traded seasonally. Main cuisine are curries & Stews, which are eaten with various kinds of rices, and bread wheat products like naan and pratas. They have loads of sweets too sweets too. They might also be growing sugar cane or beets somewhere.
(Though after a while I realised that the dress of Iwa nins were more similar to Chinese with their cheongsams. Still, we liked Indian food haha)
Amegakure: often wartorn, sandwiched between Earth Wind and fire. food is mostly freshwater mussels and fish from cultivated lakes such as freshwater carp.
Land of Grass, Kusa: food is mainly Mongolian style, fermented dairy products, meat etc.
Land of Rice Fields, Oto: food be catfish and rice and coconut. Somewhat more Thai-ish. (Entirely a self-indulgent headcanon)
Land of Hot Springs, Yugakure A lot of oden, apparently
Land of Rivers, Tani Chinese foods! Cantonese stuff, like steamed fish and dimsum, also crocodile, because native crocs in them rivers and deltas. Possibly crabs too. (As mentioned earlier I would probably swap Tani and Iwa in terms of cuisine…)
But essentially, if there were any dialects, I’d settle on that according to the cuisines.
[Obligatory plug for my friend’s fic, a fic where Nohara Rin survives getting the Sanbi stuffed into her and goes on to be volatile and alive.]