Mandarin is the official spoken Chinese language widely used in many Chinese countries.  Cantonese is one of the popular spoken Chinese languages.  Traditional and Simplified Chinese are two forms of written Chinese.  Traditional Chinese print is generally used by people from Hong Kong, Taiwan and Singapore, regardless of what they speak (Mandarin or Cantonese).   Simplified Chinese print is generally used by people from China, regardless of what they speak (Mandarin or Cantonese).