According to the Adobe Commerce Merchant Documentation, you can create different store views for different languages within a store by setting the locale option for each store view. You can also allow customers to switch currencies by setting up currency rates and assigning allowed currencies to each store view. Therefore, you can create one website with one store and two store views, one for English and one for Spanish, and assign both US Dollars and Mexican Pesos as allowed currencies for both store views.

References: https://docs.magento.com/user-guide/stores/store-language-add.html https://docs.magento.com/user-guide/stores/currency-configuration.html