It is more, High German, (Hoch Deutsch) and what folks speak....
The dialects are ludicrous in Germany. You may have flapjacks in Texas and we have pancakes in TN but their dialects change from village to village, 2 to 3km from each other.
The one I usually use as an example.
Many towns end in HEIM (home)
as in Ergersheim, Windsheim, Uffenheim You get the point.
In my wifes town they would call it A instead of heim,,,, nobody know why but it is said
ErgeshAh,,, WindsAh etc
And in the next town over they say it EEEEE
as in Ergershee,,, Windseee
Takes a while to figure out they are talking about the same darn place.
After living there a year or so, I met back with some of the original folks that helped me in my motorcycle riding, me holding a translation book in my hand and got me started. I was very proud of my German at that point till he looked at me and ask that I speak English, because surely what I was speaking was not German......... Guess it was Southern German with a Redneck American Accent.