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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


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up vote 0 down vote accepted

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

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it should be xxxual-websites.html instead of xxxual-websites.htm of the reference. googlewebmastercentral.blogspot.com/2010/03/… – Charles Yeung Apr 14 '11 at 4:14

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