The reason for adding Google translate to a blog is so that subscribers and viewers who prefer reading in another language can do this with a drop down box that is added to a blog. Selecting their language the blog automatically translates the entire blog to that language.
The instructions are..
1.Go to the Google Home page at google.com. At the top of this page are different tabs with links to various places in the Google website.
2.At the top click the drop down box more ↓ and choose Translate form the options in the menu.
3.Click on Tools and Resources make your website instantly available in other languages.
4.Select the language the blog is written in.
5.Choose optional settings
Translation settings: All languages or specific language
6.Copy and paste the snippet of code to a blog. This is a scripted html code placed on the page of the blog to be translated.