When Amish write letters, they do so largely in English, with some occasional use of German possible. Amish use English when conversing with non-Amish individuals, and when doing business with outsiders. Old Order Mennonites speak Pennsylvania German as well, and Amish and Old Order Mennonites will converse in the language. Amish tend to switch to English when non-Amish enter within earshot, out of respect and to involve the others.