nixos/pkgsets/emacs/flyspell.nix

{
  config,
  lib,
  ...
}:
with lib;
  mkIf (elem "emacs::flyspell" config.machine.pkgs) {
    programs.emacs.init.usePackage.flyspell = {
      enable = true;
      package = epkgs: null;
      diminish = ["flyspell-mode"];
      command = ["flyspell-mode" "flyspell-prog-mode"];
      hook = [];
      bind = {
        "C-M-<tab>" = "flyspell-switch-dictionary";
        "C-c f" = "ispell-word";
      };
      config = ''
        ;; Make flyspell less verbose and disable annoying keybind
        (setq flyspell-issue-message-flag nil
              flyspell-issue-welcome-flag nil
              flyspell-use-meta-tab nil)

        (defun flyspell-switch-dictionary ()
            (interactive)
            (let* ((dic ispell-current-dictionary)
            	   (change (if (string= dic "deutsch8") "english" "deutsch8")))
              (ispell-change-dictionary change)
              (message "Dictionary switched to %s" change)
              ))
      '';
    };
  }