Sometimes it can be very surprising, sometimes quite shocking, too, to see, which words of German origin you may find in English:
Here I try to collect a number of them.
which ones can you contribute?
angst
blitz (= Luftangriff, derived from Blitzkrieg)
Christkindlesmarkt
glühwein
hinterland
kitsch
lebkuchen
lied
schmaltz, schnapps, schnitzel
schmaltzy (Yiddish?)
christmas stollen (credit to Lidl and Aldi?)
doppelgänger
dummkopf
schadenfreude
poltergeist
unter-menschen