What's this?

User messages can be translated to many languages.

For this, we have 3 message template files (.pot).
These files are generated here:
https://github.com/OSGeo/grass-addons/blob/grass8/utils/cronjobs_osgeo_lxd/cron_grass8_relbranch_build_binaries.sh#L200

The messages can be translated here (this is an onjoing job!):
https://www.transifex.com/grass-gis/

For details, see:
https://grasswiki.osgeo.org/wiki/GRASS_messages_translation