Old Colony Mennonites have a number of similarities, but the cultural differences are significant enough so that members of one group would not feel comfortable moving to another group. The Old Order Mennonites and Amish have the same European roots and the language spoken in their homes is the same German dialect. Old Colony Mennonites use Low German, a different German dialect. Unlike Old Order Amish, Old Order Mennonites have meeting houses for worship, typically of very simple design and lacking adornment. In many respects some Old Order groups are very similar to Conservative Mennonites but differ particularly in their non-acceptance of Sunday School and Revival Meetings and the predominant use of the German language in their worship services. The spectrum of Old Order Mennonite groups ranges from those that differ little from even conservative Old Order Amish groups like the Swartzentruber Amish to those that are barely different from Conservative Mennonite groups concerning the use of technologies. What characterizes automobile groups as Old Order rather than Conservative Mennonite is their retention of traditional forms of worship, communion, baptism, funeral and leadership structures. By contrast, some wedding practices have changed. The Old Order Mennonites normally have neither Sunday Schools nor revival meetings. Horse-and-buggy groups have retained a rural lifestyle, with farming as an important part of their economy. Most horse-and-buggy Old Order Mennonites allow the use of tractors for farming, although some groups insist on steel-wheeled tractors to prevent their being used for road transportation. Some traditional groups, like the Orthodox Mennonites and the Noah Hoover Mennonites, still till their fields with horses. The horse-and-buggy people stress separation from the world, excommunicate, and normally shun in a strict manner. All Old Order Mennonite groups meet in meeting houses or church buildings (when they have full-fledged congregations), contrary to the Old Order Amish, who meet in the homes or barns of their members. Progressive ("automobile") Old Order Mennonites, like the Weaverland Conference Mennonites (USA), Wisler Mennonites (USA), and Markham-Waterloo Mennonite Conference (Canada), largely evolved from the same series of Old Order schisms from 1872 to 1901. Nowadays, they often share the same meeting houses with and adhere to almost identical forms of Old Order worship as their horse-and-buggy Old Order brethren with whom they parted ways in the early 20th century. Although Weaverland Old Orders began using cars in 1927, the cars were required to be plain and painted black. The