You can check if a PO file is valid with the following command:

        msgfmt -c -o /dev/null <po file>
      

The following errors were found in cmake-fedora 's PO files:

gettext: test/data/podir/po/man1/ko/ls.po: ls not a language code
gettext: test/data/podir/po/man1/sr@latin/ls.po: ls not a language code
gettext: test/data/podir/po/man1/zh_TW/ls.po: ls not a language code
gettext: test/data/podir/po/man2/de-DE/stat.po: can't guess language
gettext: test/data/podir/po/man2/de_CH/stat.po: can't guess language
gettext: test/data/podir/po/man2/ko/stat.po: can't guess language
gettext: test/data/podir/po/man2/zh-Hans/stat.po: can't guess language
      

Please ask the translator (identified by the Last-Translator field in the PO file), the language team (identified by the Language-Team field) or debian-i18n for a fix.