"Sinophone" operates as a calque on "Francophone", as the application of the logic of Francophonie to the domain of Chinese extraterritorial speech. But that analogy is sure to hiccup, like all analogies, at certain points. Some, but not all, Francophone regions are populated by descendants of French emigrants, as virtually all of Sinophonia (I think) is populated by descendants of Chinese emigrants. Other regions, the majority in both area and population, are Francophone as a result of conquest or enslavement. That might be true of some areas of China too, but in a far more distant past. And at another level, the persistence of French had to do with the exportation of educational protocols by the Grande Nation herself, something that wasn't obviously true of the Middle Kingdom in recent decades but now, with the Confucius Institutes, is perhaps taking form. (2012)