question on ports control tower

[White Owl]

Allegedly, a Pan Am 727 flight waiting for start clearance in Munich overheard the following -Lufthansa (in German): "Ground, what is our start clearance time?" Ground (in English): "If you want an answer you must speak in English." Lufthansa (in English): "I am a German, flying a German airplane, in Germany. Why must I speak English?" Unknown voice from another plane (in a beautiful British accent): "Because you lost the bloody war."

I bet most here have already seen that one, but it seemed appropriate.