I have never heard of any fakes...the "fakes" are china region cameras that will revert back to Chinese if you update the firmware...there are ways to change it back to English in multiple threads on this site...there is also a service performed by member @CBX where he can convert your camera to US region permanently...So there are known fakes?
I bought one of Amazon just to see and it was English, BUT, it had a China region code, meaning that next time you upgrade the firmware, it will revert back to Chinese. The same vendor also sells a true English version but charges a lot more for it. So if it's too good to be true, it probably is.
I complained in a review that I received a China region code camera and the seller asked Amazon to remove that feedback. So take the review with a grain of salt. Also, different sellers share the same review pool as they use the same product ID. so you never know. I believe the seller was hdsecuritystore and was 'fulfilled by Amazon'.
I bought 2 from CCTVONE on Amazon and got the real deal. See my review on page 2.
http://www.amazon.com/gp/product/B00M6NC9CG/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1