Why is the runner-up fencing champion sad? - Because she was an arm's length from victory. (In Hungarian, "arm" is "kar", while "sword" is "kard". So she was "a sword length from victory".)
What do you call the wife of a silkworm? - Silkwife (this is not funny at all in English, however, in Hungarian "silk" is "selyem", which sounds close to "nejem", meaning "my wife". So literally the punchline is "My wife worm.")