First, are you sure it doesn't have an English version? Sometimes there will be a little British flag somewhere on the page that displays in English. You could use one of the translators on the web, although many of them are inaccurate. A translator like Google's Translator Toolkit allows others to review the translated document to make sure it's accurate, so try to find something like that.
By the way, if you just need to know what something on the site says, tell me the site and I can translate for you!