I know of the Mennonites from the ones that live in Chihuahua, Mexico. Some come into town to buy things that they then take to their villages. They also sell cheese here,
queso menonita, which is a mild white cheese similar to
queso asadero, and Muenster, although it's softer than the latter.
Over the years they've become more liberal in their ways. They've begun to accept the use of automobiles lately. I sold an old Toyota of mine to a Mennonite a couple of years ago. He bought it for his son.
The Spanish they speak tends to be pretty rudementary, enough to get by on on the street. The German they speak is a bit archaic. They usually do not speak English, like the people I sold the Toyota to.
This from "Mennonite Colonies in Mexico Accept Change Slowly":
The Mexican government desired to settle the barren northern areas of their country with industrious farmers such as the Mennonites. In 1922, at the invitation of President Alvaro Obregón, 20,000 Mennonites left Canada and settled in the state of Chihuahua. Mexico agreed to sell them land at reasonable prices and level no taxes for 100 years if the Mennonites would produce the bulk of cheese needed for northern Mexico. President Obregón granted the Mennonites full control of their schools including maintenance of their language, independence of religion in both home and schools and exemption from military service.
Over the years the Mennonites have slowly accepted some changes in their lifestyle. Most have accepted the automobile and have adopted Mexican and North American architecture rather than older European styles. Their schools are fully accredited by Mexico, and teachers are college trained either in North America or Mexico. The curriculum is more extensive, including English, Spanish and geography; schools are in session longer; women as well as men are allowed to teach; and teaching is now a full-time occupation. However, criteria that determine church membership among Chihuahua Mennonites remain strict: only the children of Mennonite parents can become members and they must obey church tenets to remain in the church. Mennonites now speak Spanish as well as German and live side by side with the Tarahumara Indians.
http://www.epcc.edu/nwlibrary/borderlands/19_mennonites.htm