Lee the problem is you have an European English version and you are trying to update it with an American English patch. I know it s weird but it doesn't work. Best is you use the automatic update and take care to not update past 3.1.3, or you redownload the patches but enGB this time.
When you log on a realm type "/join english
" to get in touch with the community members.
WoW English/Chinese glossary
(2000+ translated words) found on wow-in-chinese.jfs-web.chEnglish speakers are consolidating on the same realm for Cataclysm check this thread