Amish are defined as using a horse and buggy, worshipping in their homes and speaking a German dialect.

WSJ: New research shows diversity among US Amish groups

They live in a scattering of villages in Switzerland, Austria and northern Italy, and some still speak the Walser German dialect.

BBC: Hiking the Alpine Walserweg trail

They fled to North America in the 19th Century to avoid persecution, but many Hutterites still speak with a heavy German accent and they mostly talk and pray in a German dialect.

BBC: Getting away from 'the world' Hutterite-style

Though the dialect is in danger of dying out in the next generation, traditional German cuisine promises to live on in the area.

BBC: A German enclave in central Texas