To be honest, I'm actually in favor of them not needlessly struggling to communicate with each other in broken English. I was once in an Econ class with a Chinese professor that spoke mandarin natively. As did a slim majority of the class. I recall him trying to explain something to the other mandarin-speakers and struggling before squeezing in like a 4 second mandarin quip and the response was a wave of "eureka!" across the other ones. Like he just somehow squeezed the past 40 minutes into 4 seconds and they all finally understood it completely. Astonishingly, really.