Installation of translations
Translations must be located in
Files should be be named
translations/messages.de.yaml translations/messages.de.po translations/validators.de.xlf
After the files have been placed, you must 'install' them by going to "General Settings > Localisation settings".
This will update the
/config/packages/zikula_settings.yaml file in order to indicate to the system that your new locale/translation is available.