As a long time CodeRush + Refactor Pro user I was pleased when DevExpress added a Spell Checker plugin, I was even more pleased when I opened the options page and saw I could change the culture to English (United Kingdom).  However my joy was short lived when I discovered that changing the culture effectively disables spell checking.  For a while I just switched it back to English (United States) and lived with the irritating differences, but finally I got fed up and decided to figure out how to get the spell checker working for proper English.  What I discovered was that changing the culture is not enough, you actually have to install a dictionary that matches that culture.  So when I select English (United Kingdom) in the culture list the spell checker is looking for a dictionary with the name en-GB the standard code for the UK culture.  One option would be to take the standard en-US dictionary and modify it, but I also discovered that CodeRush supports the Open Office dictionary format, so I went off in search of one to install.  This article describes the steps to download and install an Open Office dictionary with CodeRush.