How to set the total site into selected google translate?

Hi all,
I used Google Translate in one of web page in my site.
It is working if i choose what ever the language form google. But the problem is it is working in only that page. If i go to next page, it shows normal original text only… but not the selected language.

I want the whole site will be translated into specific language by choosing the user.

Give me any suggestions for doing this…

Thanking you…