How is possible with magentocomerce to use a different domain name or a virtual subfolder different for any language instead to use the actual parameters?
for example in polish language actually it is:
instead it could be http://demo.magentoskleponline.com or http://demo.magentocommerce.com/pl/
and for italian version instead of:
it could be:
instead it could be http://demo.magentocomercioelettronico.com or http://demo.magentocommerce.com/it/
in this way the search engine friendly can grow up a lot, because many people know that domain is a lot important for search engines