Well, I have China ROM (as I am connected here). But I thought the "English" language option would mean the entire phone would be in English, not only some parts. eg the user guide is Chinese, and me no speakum this. Thanks.
I also use the original Chinese ROM and since I switch to English I have not seen any Chinese on my phone besides from some Chinese apps
Are you sure that you don't have a fake phone? If in doubt, go to recovery mode and compare what you see with what you can find in the screenshots scattered all over this forum.