I know, I've searches google long and hard before getting the right PC Suite for my Iphone 4 2012 WiFi phone. You will know that you have an MT6235 chipset when you connect your phone to the computer and it pops up MT6235.
So, I won't make this long. Here is the link with tutorial to shift the application language to English.
How to switch language from Chinese to English? Please see below instructions.