Lots of language changes. Your best bet is to use a file compare utility like Beyond Compare by scooter software
http://www.scootersoftware.com
There is more changes than just in english.php check your other language files for changes also. As far as a detailed list this is not necessary from a support perspective since Classifieds is only bundled with english just use the compare tool meantioned if your trying to create your own language files.