It was fairly easy for Zane to learn how to communicate in Chinese with his exceptionally high intelligence stat. In addition to this, Gwen and Evilyn were able to learn just as quickly as he was if not quicker.
As for the other Horde Kings, their intelligence was all still in the superhuman level, even if it was not as exceptional as Zane and the other two aforementioned companions. Because of this, they were quickly able to learn how to communicate with the locals in their native tongue.
Something that would go a long way towards their goals of figuring out how to get back to North America. In the meantime, Zane was indeed curious why the local Horde King had not retaliated against the local human population of Beijing, who had slowly but surely begun to reclaim its desolate streets for humanity.
Since I'm building a stockpile for my new novel Re: Blood and Iron, I will be releasing 1 chapter a day some days of the week. And 2 chapters a day on others fro DMW. It really depends on how much work I get done.