French Kings annexed Alsace in the 17th century, though most inhabitants continued to speak a German dialect.

17世纪时，法兰西国王宣布阿尔萨斯为法国领土，不过当地大多居民之后仍然说德语。

youdao

In Alsace almost everybody, as you will see later, spoke German dialect. But it didn't mean, if you asked somebody, "Are you French?"

在阿尔萨斯基本上每个人,你以后就知道,说一种德语方言,但也不是说,你要问别人,"你是法国人吗"

耶鲁公开课 - 1871年后的法国课程节选

Now, Alsatians were French, even though many of them spoke German dialect.

阿尔萨斯人是法国人,虽然他们很多人说德国方言

耶鲁公开课 - 1871年后的法国课程节选

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