This short article explains how to quickly and easily add Google Translate functionality to Drupal content without hacking any blocks or the actual content itself. You simply stick it into a page template where it belongs.
I guess this should be done up as a module like the Google Analytics module, which helps you configure the addition of the necessary HTML and Javascript code to the pages you want through an admin interface, especially considering you need a Google key for Analytics.
But for Google Translate you do not need any keys yet and this is so simple it’s hardly worth the CVS.