Just a moment ago I had the idea of regex.
But I found another solution that works super-fast (a few seconds) and effectively Polish/English software: Duplicate Finder 1.4 https://onedrive.live.com/?cid=b4bbb812d47442de&id=B4BBB812D47442DE!122 -- <http://forum.pspad.com/read.php?2,64020,64027> PSPad freeware editor http://www.pspad.com
