You define the languages, currencies, and countries you would like to support. Languages can be freely defined as simple identifiers, e.g. en, es, fr or as full strings, e.g. English, Spanish, French.
Note: These strings can be overridden in the translation table simply by adding a translation to each translation profile including the default language.
When defining currencies you can also specify for each currency the decimal and thousands separator that should be used when displaying values in this currency.
Our BikeShop example looks like this now with drop-downs for language and currency:
NEXT: Set up payment methods