Probably too late, yes, most people do not speak English. To communicate with a not English speaking teacher, you  will have way too much to learn Burmese. At Panditarama most teachers speak and understand English, still,  for them it is a very foreign language. For the female section they have at least one capable translator. Others might have them, too. Better you ask, before doing useless travelling. For daily chores, travelling in Burma, speaking Burmese is a must, as it makes things way easier and cheaper.