phranque - 9:22 am on May 31, 2012 (gmt 0)
put the content for each geography in a separate subdomain.
make sure to properly specify the language attributes in the document markup.
set the geotargeting for each of the geography-specific subdomains in GWT.
this will filter out any duplicate content to the intended same-language targets.
(no duplicate content if languages are different.)
ideally you would host each of the geography-specific subdomains locally.
you will have to address additional issues with multilingual geographies, both in terms of visitor selection/preference and url structure.