Even with a conventional English installation of Odoo, it is possible to configure Odoo to work with a variety of languages, time zones, and currencies without downloading any additional add-ons. Odoo has very robust features for configuring a global ERP system that can meet the demands of today's multicultural business environment.
Like most Odoo features, you only need to configure the international features you require for your business. For example, you may do business entirely in US dollars but would like to offer Odoo in Spanish for some of your workstations, users, or portal customers. On the other hand, if you are purchasing from a supplier in an alternative currency, you may choose to create a special price list that allows you to do business in that currency.