Google Chrome 4.1 added a feature that detects the language of a web page and lets you translate it. The feature can't be disabled entirely (there's a setting for disabling it in the latest dev build), but you can hide the translation bar for certain languages. For example, if you go to Google Greece's homepage, there's an option button that lets you disable the translation bar for google.gr or for all Greek web pages.
The easiest way to disable the translation feature for the languages you're familiar with is to define a list of your preferred languages:
* click on the wrench menu, select Options, go to the "Under the hood" tab.
* click on "Change fonts and language settings" and go to the "Languages" tab.
* add the languages you use the read web pages.