Translation file for pl lang shows has this code:
#: ../views/hooks/form-meta.php:266
msgid “Leave blank to hide the field. Enter a 0 for events that are free.”
msgstr “”
“Pozostaw puste aby ukryć pole. Wprowadź 0 dla wydarzeń, które są darmowe.”
Thank you for reporting this. I have a list of all the broken strings in our current .pot files, and we are planning to get these fixed in an upcoming maintenance release. Thank you for your patience in the meantime.