ecoduri

I have a Romanian based language site: http://www.ecoduri.com with informations about different codes. I implemented a simple php search engine for my website on pages like this on the right side of the site http://www.ecoduri.com/coduri-siruta.php I want to add a new radio box field to select language for displayed search results on diferent languages. Is there a possibility to integrate Google Site Search with more languages? How can i do that? I need some code suggestions, to make this script run fast. Thanks all,