How do I get the websites that I visit to stop localizing the language probably according to my IP location? This is an website specific issue because, for example economist.com and superuser.com do not do it, but Google Checkout and craigslist.org are doing it. Is there a way to setup Ubuntu and Firefox so that English will always be used for all web pages displayed?

Edit: Of course many webpages have a link to an English version, but sometimes they don't. For example I believe such links usually appear on the root resource but sometimes I see non-English languages on child resources where such links do not appear. Example: most Blogger.com blogs appear in English but when I go to the blogger's profile ("view my complete profile"), it appears in another language that matches my geographic location.