{ ... }:

{
  # Etc/GMT-7 is the Posix name for UTC+7 (no DST).
  time.timeZone = "Etc/GMT-7";

  # Swiss German by default; only LC_TIME uses American English.
  i18n.defaultLocale = "de_CH.UTF-8";
  i18n.extraLocaleSettings = {
    LC_ADDRESS = "de_CH.UTF-8";
    LC_IDENTIFICATION = "de_CH.UTF-8";
    LC_MEASUREMENT = "de_CH.UTF-8";
    LC_MONETARY = "de_CH.UTF-8";
    LC_NAME = "de_CH.UTF-8";
    LC_NUMERIC = "de_CH.UTF-8";
    LC_PAPER = "de_CH.UTF-8";
    LC_TELEPHONE = "de_CH.UTF-8";
    LC_TIME = "en_US.UTF-8";
  };
}