I have to disagree with you about the quiz being easy, however.
Going from radius to volume is cubing the scale factor, not squaring
Whether it should be a word... Probably/possibly in English yes...
That said, my French pronunciation isn't great so I changed the question to "most similar" to remove all possible doubt.
Although I shouldn't complain, I hear virtually no difference between knees and niece.
Didn't know the soccer question though:(
BTW, I've got some good Dutch quizzes.