[I18N] generate and clean orphan translations

Some languages were published on Transifex in v9 but no longer in v10.
These languages were still using the outdated .po files
In some of these po, there were some fuzzy translations that were incorrect
(e.g. 'POS Order %s' - 'Kassa ostud', missing '%s')
These were not erased as still using the old translations.
Regenerate a correct .po file based on the new .pot and remove fuzzy
translations.

Fixes similar issue than raised at #14937