It was during the blitz in WW2 and London was taking a thrashing and moral was low. The BBC radio decided an interview with a Swedish Pilot for the RAF who had in his first day on the job made Ace, meaning he had shot down 5 German planes in that one day. It would be so good for the people of Britain's moral.
So that evening Sven is in the studio and the interview began;
Announcer: So Sven, tell us all about your heroic day in the skies protecting the grateful people of this country.

Sven; Vell, it vas un eencredible day. Vurst vas dis foker come up me rite zide so I shoots him down den two more of them fokers I see on my left so I shoots them fokers, and den.....

Announcer interupts; Just so you're all aware Sven comes to us from Sweden and what he means to say is Foker, that very deadly German war machine....

Sven interupts; Ya ya dats true but dese fokers vas Meserschmits!