When researching a variety of Norwegian spoken by some people in the Midwest known as “norst” or American Norwegian, someone commented that it was like the Quebecois of Norwegian.
My native language is English and I am American though, so I guess my own dialect of English would be the Quebecois of my language, or Canadian English too.
For German, I guess Pennsylvania Dutch would come closest? At least in the sense that it’s a variety of German spoken in North America. It’s barely understandable for modern-day Germans.
How about Swiss German?
Or countryside German?
Even within Swiss German itself, the people in the Canton of Valais speak such a strong dialect (actually a group of dialects) that most of the rest of Swiss German people don’t understand them.