Ironically, in China some gamers complained that the game is kind of unrealistic as all the datasheets are available in Chinese, it shouldn't and it has made the game less challenging... In real life, engineers in Shenzhen rarely read or write formal datasheets in Chinese, even when the IC is completely designed in China.
Doing it in English can be a bit difficult for a freshman who is unfamiliar with the terminology, which can make the game a bit more interesting. I wonder if the developers should add a "native language w/ English documentation" option for those who want a more authentic experience.