Since December 2007, new players may select their preferred language in which they will be greeted in "My PlayCatan" and that will be used when playing the free browser games.
If you have registered your account prior to this date, you did not have a choice: German was the only available language. If English is your native language, it might thus be difficult for you to switch your account over from German to English.
Please proceed as follows:
Please note that you have to re-install the Catan Online World client software. At the beginning of the installation process you can select the language.