Can the zombies understand English?

[HarleyQuinn]

In Chapter 27 Part 3 CJ mentions that when her tower was attacked she hid in the basement and there were zombies waiting her out around the corner but they were told by The Man in the Pinstripes to 'leave her'. It was heard of before that he could communicate in English as he did so convincingly enough for everyone but Burt to let their guard down and believe he was human, but it was never mentioned (as far as I know) that the other zombies could understand his words in English. What do you think this means in terms of their intelligence and possibly how they were created? Also, do you think this means at least some of them can understand human speech?