Ditmarschen a flat land of mostly reclaimed land, with spectacular skies and lots of holiday apartments known (in singular) as Ferienwohnung or Fewo. It is a place where many Germans holiday and is a great place for a slice of Germany as the Germans live it. What's interesting in terms of history is that the Ditmarschen does not have a historical aristocracy, being a land of, usually well-to-do farmers.
German. Most people understand English. The northern part of the region contains Danish and North Frisian minorities, thus making it possible to use those languages in addition to German in many situations.
Shrimp: in Büsum, you can buy small boiled shrimp by the kilo. Spend a happy communal time peeling them and eat them on black bread, with a fried egg over the top. An excellent abend brot (dinner) or snack!