I am following this post:
viewtopic.php?f=5&t=10979

And I get this 2 link:
http://localhost/yoursite/home.php?lc=en
http://localhost/yoursite/home.php?lc=cn

Assume I am now at:
http://localhost/yoursite/home.php?lc=cn,

and i try to link to product page, http://localhost/yoursite/product.php?lc=cn.

But it always connecting back to english version, http://localhost/yoursite/product.php?lc=en

How can I make it remember the language? Once user select chinese any page, the will always browse the website with selected language. I think I missed something here, please guide me through.

Thank you.

Never mind. I figured out the solution.