Currency and payment
The official currency in Argentina is the Argentine Peso (ARS), while in Brazil, it is the Brazilian Real (BRL). Credit cards are widely accepted at hotels, restaurants, and larger establishments, but it's advisable to carry cash for smaller purchases and local markets.
Language and communication
Spanish is the primary language spoken in Puerto Iguazu, Argentina, while Portuguese is spoken in Foz do Iguaçu, Brazil. English is also commonly understood, especially in tourist areas and hotels