Er...
English is German at it's core; read some "Old English" and see. The song "Auld Lang Syne" is German (spelled better) as Alt Lange Zeit. The UK or Britain either got invaded (Romans, Normans -- "Norse Men" invading Vikings, ex-colonies -- India, etc.) or had kings and queens from multiple countries who brought their own language -- German, French, more German.
Germany on the other hand, prevented this with a lack of street and road signs, so then when the Romans invaded about 2000 years ago (Augustus 6 BE to 4 AD), they got "lost" and turned around with a few military battles lost along the way -- likely due to the lack of maps and road signs. The same for the American military: once they got into Germany, they couldn't find their way back out; heck, the Berlin airlift came about as a way to avoid the roads. Finally with the advent of GPS navigation based devices, one can actually go from point "A" to point "B" without stopping and asking a German person for directions. The whole concept of transportation that ignored the German road system (Trains, tanks, and finally the Autobahn) evolved to get around this obstacle; even today the autobahn is laid out with signs that list the originating city for that piece of autobahn and the end city, with no others listed in between.