The GTranslatifier Jetpack feature helps you translate web pages and selected text using Google Translate.
To translate a web page into your language, just click on the 
icon in your status bar. To open the translated web page in a new tab, right click or middle click on the icon. To un-translate a translated page, click on the icon again. To translate a specific portion of a web page, select the text you wish to translate and then click on the icon.
The source code for the GTranslatifier Jetpack feature can be found at gtranslatifier.js.
Go to the EliGrey.com Forums to report a bug or suggest a feature.