The D language has almost become a German preserve, what with the only major adopters being from there. Deutsche Bahn are supposedly using it too for their platform signage.
No doubt Sociomantic Labs, which was acquired in 2014, was a major driving force there. The company was very succesful and hired a lot of the best developers interested in D at that time.
That could also explain the abraunegg-onedrive (a brown egg in German) package for Arch Linux, which is the source of DLang deps on my system :D
Symmetry Investments uses a lot of D (and pays for dconf), from London.