{ ... }:
{
  config = {
    # Select internationalisation properties.
    i18n.defaultLocale = "en_US.UTF-8";
    i18n.extraLocaleSettings = {
      LC_ADDRESS = "fr_FR.UTF-8";
      LC_IDENTIFICATION = "fr_FR.UTF-8";
      LC_MEASUREMENT = "fr_FR.UTF-8";
      LC_MONETARY = "fr_FR.UTF-8";
      LC_NAME = "fr_FR.UTF-8";
      LC_NUMERIC = "fr_FR.UTF-8";
      LC_PAPER = "fr_FR.UTF-8";
      LC_TELEPHONE = "fr_FR.UTF-8";
      LC_TIME = "fr_FR.UTF-8";
    };
  };
}
