firmen

I have a German based language site: http://www.firmentube.com with informations about different companyes. I want to implement a simple php search engine for my site on pages like this on the right side of the site http://www.firmentube.com/firmen-de/3560/Hamburg/Stadtstaat/0/Hamburg-91.php I want to add a new radio box field to select language for displayed search results on diferent languages. to display all informations about the companyes on multiple languages like English, Iatalian, Spanish 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