Wordpress translating urls of pages

i am trying to build a multilanguage website in wordpress. I made everthing working but one thing. When i have a page in different languages they all get the same url of the main language. But i want for example if i am on nl.foo.com that the url looks like this:

http://ift.tt/1EdM6RG

and if i am on en.foo.com i want it to look like this:

http://ift.tt/1CYqItQ

but both urls are the same page. Does anyone know if there is a plugin available for that or how i am able to do that. At the moment i am using qTranslate-X for translating everything else.