Mexican
el jugo
Un jugo de naranja, por favor.
An orange juice, please.
Juice
Rioplatense
el jugo
Un jugo de naranja, por favor.
An orange juice, please.
Castilian
el zumo
Un zumo de naranja, por favor.
An orange juice, please.
Fruit juice is jugo across most of Latin America. In Spain the usual word in shops and cafés is zumo. Jugo exists in Spain with other senses and is less common for breakfast juice.