My feeling is that it will follow the standard subtitle areas, those of the major European languages. I doubt that it will have Cantonese or Manadarin Chinese unless the box set is available for export to Asia. The set maybe region free but usually a seperate release will be made in Asia with Chinese and Cantonese subtitles for those in Hong Kong, Taiwan or China. However, this will usually be after the UK release date. Having resided in Taiwan for a number of years previously they will have such a release but only after release in the US or UK and usually a few months after. Hope this helps?