No. All your suggested code snippet can't do the job.

That surprises me. But good that you found something that works for you.

So you want to also have predictive word suggestions from your dictionaries using something like company?

Yes.

Unfortunately, I won’t be able to help you with that.

You probably just need to ensure that the Flyspell package has been loaded, i.e. run (require 'flyspell).

No. All your suggested code snippet can't do the job. I found the following working code snippet from here:

(use-package flyspell :demand t
   :config
   (use-package 
     flyspell-correct-helm) 
   (defun flyspellCompletion() 
     (flyspell-mode 1) 
     (set (make-local-variable 'company-backends) 
          (copy-tree company-backends)) 
     (add-to-list 'company-backends 'company-ispell)) 
   (defun flyspell-most-modes() 
     (add-hook 'text-mode-hook 'flyspellCompletion) 
     (add-hook 'prog-mode-hook 'flyspellCompletion)
     (dolist (hook '(change-log-mode-hook log-edit-mode-hook)) 
       (add-hook hook (lambda () 
                        (flyspell-mode -1))))) 
   (flyspell-most-modes) 
   :bind (:map flyspell-mode-map
               ("C-." . flyspell-correct-wrapper)))

So you want to also have predictive word suggestions from your dictionaries using something like company?

Yes.

And see the screenshot below when I click on the middle button:

You probably just need to ensure that the Flyspell package has been loaded, i.e. run (require 'flyspell).

I want to have a drop-down menu, just as we have for command completion with company, which is triggered by...

So you want to also have predictive word suggestions from your dictionaries using something like company? Unfortunately, I do not know of a way to enable something like this reliably.

Could you be more specific with what you dislike about it?

I want to have a drop-down menu which is triggered by the threshold of a specific minimum input character number, say, 3, and then incrementally narrowed down as the input sequence increases.

If you want the menu that is triggered by middle-clicking with your mouse,

Yes.

(define-key global-map [mouse-2] #'flyspell-correct-word)

I tried with the following code:

(add-hook 'after-init-hook #'global-flycheck-mode)
(define-key global-map [mouse-2] #'flyspell-correct-word)

And see the screenshot below:

I personally think selecting from the suggestion list is pretty convenient as-is, selecting the fix with just one keystroke. Could you be more specific with what you dislike about it?

I have seen the method of re-binding it with the mouse button.

Sorry, but I don't quite know what you mean here. If you want the menu that is triggered by middle-clicking with your mouse, you can try the following. Note that while this functionality is provided by Flyspell, you do not have to have flyspell-mode enabled for it to work.

(define-key global-map [mouse-2] #'flyspell-correct-word)

See mine:

Is there a more convenient way to select from the list? I have seen the method of re-binding it with the mouse button. But TBF, I can't think of the specific command for this trick. I'm rather a newbie to Emacs.

But I still don't have a convenient way to select an appropriate entry from the candidate correction list.

As I've said, this is handled by the Emacs Ispell mode. I think the default binding for fixing a misspelled word is M-$ which is bound to ispell-word, but you can of course also add your own keybinding.

With the recommended configurations that you are using, the fixes offered by the ispell-word popup will always match the suggestions in the list of corrections shown by flycheck-aspell.

are you sure you have enabled flycheck-mode in your buffer?

You're right, and now I add the following line into my init file:

(add-hook 'after-init-hook #'global-flycheck-mode)

But I still don't have a convenient way to select an appropriate entry from the candidate correction list.

The last code snippet of the instructions here should be the following (You omit a ) at the end.):

Thank you, should be fixed now.

But Emacs doesn't hint me the wrong word and suggest changes, as shown below.

This might be a basic question, but are you sure you have enabled flycheck-mode in your buffer? Try M-x flycheck-mode and see if the suggestions appear.

Thank you very much. The last code snippet of the instructions here should be the following (You omit a ) at the end.):

(advice-add #'ispell-pdict-save :after #'flycheck-maybe-recheck)
(defun flycheck-maybe-recheck (_)
  (when (bound-and-true-p flycheck-mode)
   (flycheck-buffer)))

I've tried the following settings based on the above instructions:

(use-package flycheck-aspell)
;; Ensure `flycheck-aspell' is available
(require 'flycheck-aspell)
;; If you want to check TeX/LaTeX/ConTeXt buffers
(add-to-list 'flycheck-checkers 'tex-aspell-dynamic)
;; If you want to check Markdown/GFM buffers
(add-to-list 'flycheck-checkers 'markdown-aspell-dynamic)
;; If you want to check HTML buffers
(add-to-list 'flycheck-checkers 'html-aspell-dynamic)
;; If you want to check XML/SGML buffers
(add-to-list 'flycheck-checkers 'xml-aspell-dynamic)
;; If you want to check Nroff/Troff/Groff buffers
(add-to-list 'flycheck-checkers 'nroff-aspell-dynamic)
;; If you want to check Texinfo buffers
(add-to-list 'flycheck-checkers 'texinfo-aspell-dynamic)
;; If you want to check comments and strings for C-like languages
(add-to-list 'flycheck-checkers 'c-aspell-dynamic)
;; If you want to check message buffers
(add-to-list 'flycheck-checkers 'mail-aspell-dynamic)

(setq ispell-dictionary "en")
(setq ispell-program-name "aspell")
(setq ispell-silently-savep t)

(advice-add #'ispell-pdict-save :after #'flycheck-maybe-recheck)
(defun flycheck-maybe-recheck (_)
  (when (bound-and-true-p flycheck-mode)
   (flycheck-buffer)))

But Emacs doesn't hint me the wrong word and suggest changes, as shown below:

But how to activate it and let it fix the misspelled words automatically?

I'm not quite sure if you have the correct idea about what flycheck-aspell is supposed to do for you. It will only highlight the misspelled words for you, fixing them is handled by Emacs' Ispell mode.

But how to activate it

Unfortunately, the setup with Flycheck is somewhat unintuitive, as Flycheck only supports checkers that are specific to modes and not really "global" checkers that are supposed to work for all modes. If you are not already using Flycheck for other things, I would recommend that you switch to Flymake, which is built-in and works much better with my spell checking mode. The setup instructions for that are here

If you do want to use Flycheck, which I totally understand why you would, I have just updated the setup instructions here to be more detailed. In case anything is confusing, just tell me, and I'll be happy to help.

On Ubuntu 20.04, I've aspell installed:

$ aspell --version
@(#) International Ispell Version 3.1.20 (but really Aspell 0.60.8)

And I installed flycheck-aspell:

(use-package flycheck-aspell)

But how to activate it and let it fix the misspelled words automatically?

Regards, HY

Thanks for your comment. Adding the comment type: ignore doesn't help to pass the test. This is explicitly ignored. But what is bad, is that this method suffers the same default as xdotool. This was masked in my tests because I had done setxkbmap before. After a reboot, I was nuked.

A new option --simulate-input-method is added. This replaces xdotool and needs pynput as new module. See #4

Hello, I had no results with autokey. It doesn't seem to be usable as a module. I tried also keyboard, but this one needs root access, which is no way. Finally, I have something working with pynput, which is thus a new dependency.

Stock Emacs already has a package called "flyspell-mode". It is rather old and sometimes behaves weirdly, but I think it would still be nice to have a small introduction at the README, how flycheck-aspell is better.

Could that be added?

I have just rewritten a large part of the README, incorporating your suggestion of adding a comparison to flyspell-mode. Feel free to leave any further suggestions here or open a new issue or discussion.