There is an online overview of packaged translations, updated frequently.
As in many free software projects, translations of this document are kept in PO files. More information about the process can be found in /usr/share/doc/debian-edu-doc/README.debian-edu-bookworm-manual-translations
.
Most language teams have decided to translate via Weblate. See https://hosted.weblate.org/projects/debian-edu-documentation/bookworm-manual/ for more information.
Please report any problems.