 FACT: In the movie, some people speak Mandarin Chinese and some  people speak Cantonese Chinese, sometimes in the same conversation.  Also, Julia Fang, who is only seen speaking Cantonese, translates a  poorly spoken Mandarin recording to Shaw. Also, Fang pronounces Mrs.  Lis name wrong, she pronounced it "Lie" when it is pronounced  "Lee". The interpreter for the conference translates the English  into Cantonese, which would never be done. Most Cantonese speaking  people can speak Mandarin, but almost no Mandarin speaking people  can speak Cantonese.