{
  config,
  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 = null; # FIXME Breaks on Wayland.
      fcitx5 = {
        addons = with pkgs; [
          fcitx5-configtool
          fcitx5-mozc
        ];
        waylandFrontend = config.nixfiles.modules.wayland.enable;
      };
    };
  };

  services.xserver.xkb = {
    layout = "us,ru";
    variant = ",phonetic";
    options = concatStringsSep "," [
      "caps:escape"
      "compose:menu"
      "grp:win_space_toggle"
      "terminate:ctrl_alt_bksp"
    ];
  };
}