my SpreeCommerce Shop (2.4, spree_i18n 2.4 ist installed) does not detect the browser language preferences. Just the default language will be displayed.
Language configurations are set on the SpreeCommerce admin page ( Supported Locales and Available Locales).
Any advice would be great.
You need to add some logic to your application to set the Rails.locale to one of the locales which you support based upon the request Accept-Language passed in.
This functionality isn't supported directly by spree-i18n, but designed to be implemented by your application.