The South Dakota Indian taco is the Northern Plains reading of fry bread, and the regional distinction is the point: this is the Lakota and Dakota fry bread of the Sioux reservations and the powwow grounds, not the Diné fry bread of the Southwest that anchors the Navajo taco. The dough and the open-face load look similar across the country, but here the bread carries its own name, often wojapi-adjacent traditions on the sweet side and a coarser, sturdier round on the savory side, and the sandwich is bound to a specific place: the powwow circuit and the state fair through the Dakotas, where it is the dish a stand is judged on. The defining decision is the same substitution the whole family makes, a hot fried bread standing where a tortilla or a corn shell would, read through a Northern Plains lineage rather than a Southwestern one.
The craft is in the dough and the moment it leaves the oil. A soft wheat dough is mixed, rested so it puffs rather than seizing, pressed flat, and dropped into hot fat, where it blisters into a chewy round that is crisp at the edge and pillowy through the middle. Pulled early it is slack and raw; left too long it goes to leather and the round has no give. The Plains build tends to a larger, sturdier round because the load is generous: seasoned ground beef, beans, shredded cheese, lettuce, tomato, and salsa, piled on flat and eaten with a fork like a tostada rather than folded in the hand. Because the bread is rich and absorbent, the toppings are kept structured and not too wet so the round carries a full plate open-face without dissolving from the bottom, and the cool, sharp accents, the raw onion and the salsa, are the counter to a hot, greasy, soft base.
The variations are regional and structural at once. A folded handheld build closes the round around the filling like a turnover instead of serving it flat; a buffalo or bison build swaps the ground beef for the Plains meat; a sweet version drops the savory load entirely for honey or a berry sauce. The Navajo taco is the same idea read through the Southwest, the broader Indian taco its catch-all name, and the wider American folded-bread family its distant cousin, and each of those deserves its own article rather than being crowded in here.