It seems the polish translator has forgotten to provide a translation for that english text. CC can't find the appropriate polish text and then CC uses the english text string instead. Because e.g. in the dutch version this text is correctly ""translated"".
This could be another ""translation"" ommision made by the polish translator. So, I would advise you to find out who translated the strings for the polish version and send him a PM to tell him what can be improved in the polish translation.