Machine translation is really difficult. Why not using Google Translate?
Topic on Talk:Content translation
Machine translation by Google Translate?
You can now use Google Translate to translate articles on Wikipedia
Google Translate is not free.
You can try the new feature in the GoogleTrans gadget which replaces the text in the second column of the Content Translation system with the translated text, while keeping the HTML markup.
for help on this
Google Translate is now available