hello You need define you need use SefTransalte as ajax or as redirect.
If as ajax mode - you need fix al JavaScrip errors.
for now on your site I see:
Error: this.h is undefined Source File: translate.googleapis.com/translate_stati...t/20/element_main.js Line: 362
Because google ask money for use they API - you may show that error to google.
We propose use Bing API - it give some free quota for translate