there are some old dialects spoken in the US
i heard some of the dialects have vanished in europe, but are perserved to a certain degree in old german farming communities in the states.
i pulled this off wikipedia for those who are curious:
In the United States, the teaching of the German language to latter-age students has given rise to a pidgin variant which combines the German language with the grammar and spelling rules of the English language. It is often understandable by either party. The speakers of this language often refer to it as Amerikanisch or Amerikanischdeutsch, although it is known in English as American German. However, this is a pidgin, not a dialect. In the USA, in the Amana Colonies in the state of Iowa Amana German is spoken.
Hutterite German (Hutterisch) is an Upper German dialect of the Austro-Bavarian variety of the German language, which is spoken by Hutterite communities in Canada and the United States. Hutterite is also called Tirolean, but this is an anachronism.
Hutterite is spoken in the US states of Washington, Montana, North Dakota and South Dakota, and Minnesota; and in the Canadian provinces of Alberta, Saskatchewan and Manitoba. Its speakers belong to some Schmiedleit, Lehrerleit, and Dariusleit Hutterite groups, but there are also speakers among the older generations of Prairieleit (the descendants of those Hutterites who chose not to settle in colonies). Hutterite children who grow up in the colonies learn and speak first Hutterite German before learning English in the public school, the standard language of the surrounding areas. Many colonies though continue with German Grammar School, separate from the public school, throughout a student's elementary education.