Den 23. okt. 2021 kl. 14.55 skrev Daniel Martín <mardani29@yahoo.es>:

Niels Søndergaard <nisoni@algon.dk> writes:

Dear Daniel,
I’m starting emacs from the GUI in /Applications, even if it’s in a terminal.

You’re not mistaken, the Lisp form gives me the danish version.

So my problem is solved and my case can be closed
Thanks

Thanks for confirming that the workaround is working for you.  We'll try
to make Emacs detect and apply the locale automatically on macOS so that
you don't need to set it manually.