Can I import data in more than one language?

The import wizard imports one language at a time, the language of the user doing the import. If you have the same data in different languages, run an import for each additional language.

Important Salesforce has replaced the individual import wizards for accounts, contacts, and other objects with the Data Import Wizard. Individual import wizards open in small windows, while the Data Import Wizard opens in a full browser with dataimporter.app at the end of the URL. From Setup, enter Data Import Wizard in the Quick Find box, then select Data Import Wizard. The options you see depend on your permissions.