Mr. Verb reports that German immigrants in Wisconsin were pretty lazy about learning English. Stupid lazy Germans. This is more evidence that there is indeed an Amish loophole because you know the Amish are also German and they don't have to learn English. Compared that with those industrious hispanic immigrants who are learning English like it's going out of style.
In many of the original German settlements in the mid-1800s from southeastern Wisconsin to Lake Winnebago and the Fox Valley, the researchers found that German remained the primary language of commerce, education and religion well into the early 20th century. Some second- and even third-generation German immigrants who were born in Wisconsin still spoke only German as adults.