Malcolm, I agree with you. It's impossible to give a song proper emotional connection without knowing the meaning of each part of the sentence.However, that shouldn't stop people from at least attempting the song, and later learning what it means.
BTW, most translations, unless it is given as a "LITERAL translation" are going to be off the mark.
Most of the "translations" I have seen come far short of the actual meaning of the original words. It gets worse if they try to maintain the metre of the original words. Boy does it get funny how English gets twisted around.