Re: numbers instead of accented letters...

[Eli Zaretskii <eliz@gnu.org>]

> From: Jean-Christophe Helary <brandelune@gmail.com>
> Date: Sun, 25 Nov 2018 13:22:41 +0900
> 
> >> (setq locale-coding-system 'utf-8)
> >> (set-terminal-coding-system 'utf-8)
> >> (set-keyboard-coding-system 'utf-8)
> >> (set-selection-coding-system 'utf-8)
> >> (prefer-coding-system 'utf-8)
> >> (when (display-graphic-p)
> >>  (setq x-select-request-type '(UTF8_STRING COMPOUND_TEXT TEXT STRING)))
> > 
> > On what OS is that?
> 
> macOS

Then I'm not sure the above is right, and you should remove that.
Although it doesn't seem to be the root cause of your problem.

> > Also, what other non-ASCII characters do you have in your .emacs.el?
> 
> Most of my comments are written in French so there are a few others.

I think you will have to review all of them.  Look for those which are
shown as a single octal escape, not 2 octal escapes one after the
other.

If nothing else help, bisect your .emacs.el to find the part which
causes this, and if looking at it doesn't provide a clue, post that
part here.