zanata bridge might be broken?
I have updated Turkish translation on fedora.zanata.org but it hasn't got any effect on the PO files.
Even, pot file on Damned Lies (https://l10n.gnome.org/module/plymouth/) is fresher than Plymouth's pot file.
Also, some other languages looks have been fully translated (https://fedora.zanata.org/webtrans/translate?project=plymouth&iteration=master&localeId=fr&locale=en-GB&dswid=-2212#view:doc;doc:plymouth) but they have less translated strings on here.