Mexican
la papa
Unas papas fritas, por favor.
Some fries, please.
Mexican
la papa
Unas papas fritas, por favor.
Some fries, please.
Rioplatense
la papa
Unas papas fritas, por favor.
Some fries, please.
Castilian
la patata
Unas patatas fritas, por favor.
Some fries, please.
Papa is the everyday word for potato across most of Latin America. Spain uses patata. In Spain papa more often means the Pope or, in some regions, a different food sense, so the Latin American grocery meaning does not map one-to-one.