by kenjipl » 11:01am, Tue 12 Aug, 2014
Don't know if you solved it, but developers made some changes and they are finally using gettext utility from what it looks like (big plus for thats). Also, it looks like somoene forget or did not manage to move polish from *.php files to new format. I encountered this problem myself after update 2 days ago.
You need to manually edit under your admin\locale\pl\phplist.po file to update translation. Use any gettext editor.
For menu options you should look for keywoards in translated words such as:
pagetitle:*
eg. pagetitle:configure
There are much untranslated entries in original file. I have only 860/1746 translations done so far. And it looks like oficial translation is still at 1%.