http://www.overclockersclub.com/news/33132/ Skip the YouTube video to 7 mins in. This is a great achievement in technology. Being Taiwanese, the mandarin speech accuracy is decent for a technology demonstrator.
While I do not speak any of the Chinese dialects, the audience reaction tells the story. This is an amazing breakthrough, especially if the translation is in the user's own voice. (I wasn't clear on that point. Does it use only his voice or each user's?)