title: How to use Google Language API to add multilingual in the website using PHP language?
body: <p>I have created a website, I want to add 3 languages(Taiwan, China, English) for this website - multilingual website. 
  I've tried to find Google Language API tutorial, but I really very understand their guideline and don't know how to use it. Do yours have some simple coding example can introduce for me to refer to add multilingual in the website? Thanks.</p>