Store languages, currencies and locales
Key Takeaway
Turn on languages and currencies for the org first, then choose them in each store. A buyer whose language or currency the store doesn't support sees the store's default.
A B2B store can serve buyers in more than one language and currency. You first turn most of these options on for the whole org. Each store then picks which ones it supports and sets a default. Locales can also split one store into regional markets, so you don't need a separate store for each region.
Two layers: org and store
Store localization works in two layers. The org decides which languages and currencies are available. Each store then chooses from that list.
A store's available languages are the languages enabled in Translation Workbench. A store's available currencies are the currencies enabled in the org.
The Commerce Setup Assistant and the Store Setup Assistant give you a guided path for creating a store. You can customize the store by configuring its locales, languages and currencies. If you haven't configured these before you create the store, only the org's default options show. You can still update these values after the store is created.