This does exactly the same as http://userscripts.org/scripts/show/9649 but will work with the latest HTML changes on the searchpage by google.

Description from http://userscripts.org/scripts/show/9649:

On google result pages, this script adds a select-box to change the language code (hl parameter), on next to the search button.
It makes a shortcut to foreign googles, an easy way of <http://www.google.com/language_tools>.
By default, language code list is long, You can modify the list array on the source code if desired. e.g.) var list = ['en', 'ja', 'xx-hacker']