Admin language
Updated
The Settings page has a language selector for the app's own admin, meaning the pages you as the merchant use to configure everything. It's set during the setup wizard and can be changed at any time afterward.
Supported languages
English, French, German, Spanish, Italian, Portuguese and Dutch.
This is separate from what shoppers see
Admin language only affects how the app reads to you. It has no effect on your storefront. What shoppers see is covered by Wording and translations, which follows your storefront's own active language automatically, independent of whatever language you've chosen for the admin.