{
  lib,
  pkgs,
  ...
}:
with lib; {
  i18n = {
    defaultLocale = mkDefault "en_GB.UTF-8";
    supportedLocales = [
      "C.UTF-8/UTF-8"
      "en_GB.UTF-8/UTF-8"
      "en_US.UTF-8/UTF-8"
      "ja_JP.UTF-8/UTF-8"
      "ru_RU.UTF-8/UTF-8"
    ];

    inputMethod = {
      enabled = "fcitx5";
      fcitx5.addons = with pkgs; [
        fcitx5-configtool
        fcitx5-mozc
      ];
    };
  };

  hm.xdg.configFile."fcitx5/profile".text = generators.toINI {} {
    "Groups/0" = {
      Name = "Default";
      DefaultIM = "mozc";
      "Default Layout" = "us";
    };

    "Groups/0/Items/0" = {
      Name = "keyboard-us";
      Layout = "";
    };

    "Groups/0/Items/1" = {
      Name = "mozc";
      Layout = "us";
    };

    "Groups/0/Items/2" = {
      Name = "keyboard-ru-phonetic";
      Layout = "";
    };

    GroupOrder."0" = "Default";
  };

  services.xserver = {
    layout = "us";
    xkbOptions = concatStringsSep "," [
      "caps:escape"
      "compose:menu"
      "terminate:ctrl_alt_bksp"
    ];
  };
}