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 lazarus 's PO files:

gettext: components/onlinepackagemanager/languages/opkman_zip.fi.po: zip not a language code
gettext: components/onlinepackagemanager/languages/opkman_zip.fr.po: zip not a language code
gettext: components/onlinepackagemanager/languages/opkman_zip.hu.po: zip not a language code
gettext: components/onlinepackagemanager/languages/opkman_zip.lt.po: zip not a language code
gettext: components/onlinepackagemanager/languages/opkman_zip.pt_BR.po: zip not a language code
gettext: components/onlinepackagemanager/languages/opkman_zip.ru.po: zip not a language code
gettext: components/onlinepackagemanager/languages/opkman_zip.tr.po: zip not a language code
gettext: components/onlinepackagemanager/languages/opkman_zip.uk.po: zip not a language code
gettext: components/onlinepackagemanager/languages/opkman_zip.zh_CN.po: zip not a language code
gettext: languages/lazaruside.lt.po:5240: 'msgid' and 'msgstr' entries do not both end with '\n'
languages/lazaruside.lt.po:5445: 'msgid' and 'msgstr' entries do not both end with '\n'
languages/lazaruside.lt.po:12127: 'msgid' and 'msgstr' entries do not both end with '\n'
languages/lazaruside.lt.po:17394: 'msgid' and 'msgstr' entries do not both end with '\n'
languages/lazaruside.lt.po:19159: 'msgid' and 'msgstr' entries do not both end with '\n'
msgfmt: found 5 fatal errors
gettext: languages/lazaruside.uk.po:10296: 'msgid' and 'msgstr' entries do not both end with '\n'
languages/lazaruside.uk.po:12004: 'msgid' and 'msgstr' entries do not both end with '\n'
languages/lazaruside.uk.po:17085: 'msgid' and 'msgstr' entries do not both end with '\n'
msgfmt: found 3 fatal errors
      

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.