L11: missing locale files

On my Librem 5 I can set LANG=es_ES.UTF-8 and the messages of commands come out in Spanish:

purism@pureos:~$ date
Tue 07 Nov 2023 12:48:20 PM CET

purism@pureos:~$ LANG=es_ES.UTF-8 date
mar 07 nov 2023 12:47:29 CET

(mar means martes, in English Tuesday)

This does not work on the Librem 11. I looked withg strace into it and saw that on the L5 I have:

purism@pureos:~$ ls -l /usr/lib/locale/
total 5812
drwxr-xr-x 3 root root    4096 Oct  4 05:58 C.UTF-8
-rw-r--r-- 1 root root 5997472 Oct  4 05:59 locale-archive

On the L11 the file locale-archive is not there. I copied it over from the L5 to the L11 and it seems to work. I removed it again.

What is the correct way to get it?

I assume you need to generate the locales for it. Normally that happens whenever it is updated via apt.

How do I generate the locales. I never did anything for it on the L5. And on the L11 I run nearly daily an apt update && apt full-upgrade. The first time it updated 90 packages.

From the Debian Wiki: