DSpace provides some interface translations, but at this time they must
be downloaded & installed separately. Depending on which DSpace user
interface you are using, the available language packs are at:
DSpace provides some interface translations, but at this time they must be downloaded & installed separately.
Actually running mvn package during the normal course of the installation/upgrade process will fetch the latest translations from those langpack repos. Not sure if this is the case for our "binary" package, but it is so when building from dspace-src or from git.
All that's needed is to set webui.supported.locales per documentation.