You can't really complain that Chinese companies exploit a market left untouched by culturally-ignorant Western companies. I bet if more US companies spent more time targeting the Chinese market in the right way (i.e. perfect i18n support, interfaces built with Chinese languages in mind etc), these knockoffs would get less traction.

(Of course there's always the political problem, the knockoffs are often State-sponsored etc etc, but I bet they'd suffer in face of superior competition, if they actually had real competition.)