I used this code and it worked

if ($language_code == "es") return "beez";
if ($language_code == "en") return "wideheaderblankbottonmarzo2011-2";

But I have two languages so far maybe more next year and four templates  english en-gb front page template and spanish es-es front page template and an english template for everthing else when joomla front end language is en-g and a spanish template for everything else when language is es-es I am using joomfish to select language on front page and community builder for registration joomla 1.5.22 and joomla built in sef urls if that matters? I want 4 templates like I said the code your recommended in the forums below that I modified doesn't work? I was going to use it and then continue on with another rule to specify the others.

if ($content_genius->check("pagetype = frontpage")) {
  if ($language_code == "es") return "beez";
  if ($language_code == "en") return "wideheaderblankbottonmarzo2011-2";
// add more as appropriate...
}