How to add a new language to the UMC (webFrontend) post-installation?

My UCS deployment has only English and German languages for the UCM and I would like to add French.
Is it possible? If so, how to do it?

I just checked if there were any languagepack or translation packages but there are none. Digging deeper it seems like all available translations get installed by default. There’s an old thread, Translation, which pointed me to the existence of .po and .mo files but there’s only a German one (English probably being hard coded as the default language):

root@ucs-addc:~$ find /usr/share/univention-* -name \*po -or -name \*mo
/usr/share/univention-management-console/i18n/de/serveroverview.mo
/usr/share/univention-management-console/i18n/de/ucr.mo
/usr/share/univention-management-console/i18n/de/udm.mo
/usr/share/univention-management-console/i18n/de/umc-core.mo
/usr/share/univention-management-console/i18n/de/services.mo
/usr/share/univention-management-console/i18n/de/apps.mo
/usr/share/univention-management-console/i18n/de/quota.mo
/usr/share/univention-management-console/i18n/de/udm-saml.mo
/usr/share/univention-management-console/i18n/de/appcenter.mo
/usr/share/univention-management-console/i18n/de/setup.mo
/usr/share/univention-management-console/i18n/de/lib.mo
/usr/share/univention-management-console/i18n/de/top.mo
/usr/share/univention-management-console/i18n/de/ipchange.mo
/usr/share/univention-management-console/i18n/de/join.mo
/usr/share/univention-management-console/i18n/de/adtakeover.mo
/usr/share/univention-management-console/i18n/de/adconnector.mo
/usr/share/univention-management-console/i18n/de/sysinfo.mo
/usr/share/univention-management-console/i18n/de/reboot.mo
/usr/share/univention-management-console/i18n/de/mrtg.mo
/usr/share/univention-management-console/i18n/de/admindiary.mo
/usr/share/univention-management-console/i18n/de/updater.mo
/usr/share/univention-management-console/i18n/de/diagnostic.mo
/usr/share/univention-management-console/i18n/de/passwordreset.mo
/usr/share/univention-management-console-frontend/de.po
/usr/share/univention-management-console-login/de.po
/usr/share/univention-portal/de.po
/usr/share/univention-self-service/www/de.po
/usr/share/univention-server-overview/de.po
/usr/share/univention-system-setup/www/de.po

The thread mentioned some ongoing discussion. Maybe they have some results now, 8 years later.

My understanding is that you can select multiple languages during the intitial setup but I deployed UCS Appliance for VMware which came pre-installed with English & German only.

Since I am in Canada where English & French are both official languages, I would need to get installed the French version of all UCS stuff.

Univention should provide language packs that could be downloaded and installed as it is customary for many multi-lingual software packages.