Why did you start a second thread asking the same question? That usually doesn't yield results any faster and it tends to irritate people. Patience grasshopper...
*edit* And yes, there are language packs out there, you just have to search. But, be warned, getting them on your phone is not an easy task, as it requires flex patching on your phone. And if you are successful in getting the language pack to work, switching back and forth may not be as easy as you want it to be...