[Bug]: last job timestamp localization wrong

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

28.0.4.1 (community docker, Apache), Windows/Firefox. User interface is set to en-UK and shows correct "base" interface language. but dynamic string when the job effectively run localizes in German (which might be my region)

Transifex translation is "Last job ran {relativeTime}."

The problem is related to "Locale: German" switching to English makes the string to "full English".

addition

testing the issue I found many locale definitions are wrong e.g.

using AM/PM format and MM/dd/yyyy format is not common in Germany and Switzerland. both use "dd.MM.yyyy HH.mm" format without AM/PM

Steps to reproduce

1. set you personal settings at https://nextcloud.mydomain.tld/settings/user to Language "English (US)" and Locale: "German"
2. visit "Basic Admin settings" at https://nextcloud.mydomain.tld/settings/admin
3. observe the main language is English while "{relative time}" is localized in German

Expected behavior

• localized relative time must follow the main language
• locales must follow common country standard

Installation method

Community Docker image

Nextcloud Server version

28

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database engine version

PostgreSQL

Is this bug present after an update or on a fresh install?

Upgraded to a MAJOR version (ex. 22 to 23)

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

core

List of activated Apps

core

Nextcloud Signing status

not relevant

Nextcloud Logs

nothing important

Additional info

No response

Reproduce the mismatch using the reported English (US) language and German locale settings on the Basic Admin settings page. Trace how the relative-time string and date formats select language versus locale, then verify that relative time follows the main language and that German and Swiss formats use the expected local conventions.