Version 8 Multilingual Search Block
How does one perform a search on a multilingual website that will return results for languages other than the default language?
You can specify the a page in the sitemap. So this gives the scope of the search block.
So we are preparing a hidden search page for each langugage and are specifiying the sitetree.
As addition we place a search block in the header that points to the hidden search for each language.
hope that helps