SEO - multilingual issue

Question

Hi
In my site, the multilingual path is look like:

e.g. www.example.com/en/index.html

I want to ask is it necessary to use sub domain for SEO best practice?

e.g. www.en.example.com/index.html

Thanks

Answer 1

Google say you can use either: http://googlewebmastercentral.blogspot.com/2010/03/working-with-multilingual-websites.htm