I just recognized that some jokes works only for Germans. Spring is also a German word for jump.

A German Folk Singer Fredl Fesl figured out that English is a strange language for Bavarians, because
… zu I sagen sie I, zu Ei sagen sie egg, zu Eck sagen sie corner und zu Koana sagen sie nobody...

Bavarian I sounds like English "ee" and then the translation of similar sounding Bavarian vocabularies starts.