E.g. compare fixcopyright:MediaWiki:Eucc-option-protect-public-domain-text-v3/hu with translatewiki:MediaWiki:Eucc-option-protect-public-domain-text-v3/hu. All the Hungarian translations were added by L10n-bot in one go a day ago, and they do include the correct translation so this is some kind of l10n cache problem.
Apparently these affects all translations except en, de, fr, es (so 10 languages).