It isn't a "German Only" game.
It is a fact though, that most WW2 type games originating in the USA from the 70's on whether cardboard-shuffling or computer tend to use German-related names. Like Panzerblitz, Cross of Iron, Tigers on the Prowl, Panthers in the Shadows, PanzerBlitz, Blitzkreig, Steel Panthers etc etc.
Here in the UK, we tended to avoid paper hex based games as wargamers, and concentrate on "proper" tabletop games with model soldiers and rules books. US imports were rather expensive (£30 for each module of Squad Leader, when I bought my first Honda 125 for about £370, which if I had bought all the modules, would be about equivalent ISTR
!) Commercially available wargames rules here tended to the prosaic, like "Wargames Research Group Rules 1925-50" and about the only "snappy" titles were the late Bruce Rea-Taylor's "Firefly" (WW2) and "Challenger" (modern) from tabletop games, or "Cambrai To Sinai" in the 70s (1914-80s) by London Wargames Club (or was it Reading?). A book of rules cost about £3, enough troops for an army in 1/300 were a fiver, and the local wargames club provided the tables and terrain.
Perhaps from a USA-oriented "marketing" POV the Germanic-centred names in games titles were seen as "sexy" or "kewl" ? - who knows?. This side of the pond, certainly not.
Cheers
Andy