YOU SAID:

And all the world's weight is on my back and I don't even know why

INTO JAPANESE

世界のすべての重量は私の背中と私もなぜかわからない

BACK INTO ENGLISH

all the weight of the world on my back and i do not know why

INTO JAPANESE

私の背中に世界のすべての重さと私は理由を知っていません

BACK INTO ENGLISH

on my back all the weight of the world and i do not know why

INTO JAPANESE

私の背中は、世界のすべての重さと私は理由を知っていません

BACK INTO ENGLISH

my back is all the weight of the world and i do not know why

INTO JAPANESE

私の背中は、世界のすべての重量とわからない理由

BACK INTO ENGLISH

my back is all the weight of the world and don't know why

INTO JAPANESE

私の背中は、世界のすべての重量、なぜ知らない

BACK INTO ENGLISH

i back all the weight of the world, do not know why

INTO JAPANESE

私は世界のすべての重量をバックアップ、わからない理由

BACK INTO ENGLISH

i backed up all the weight of the world, do not know why

INTO JAPANESE

理由がわからない、私は世界のすべての重量をバックアップ

BACK INTO ENGLISH

do not know why, i backed up all the weight of the world

INTO JAPANESE

なぜか、私は世界のすべての重量をバックアップ

BACK INTO ENGLISH

for some reason, i backed up all the weight of the world

INTO JAPANESE

いくつかの理由で、私は世界のすべての重量をバックアップ

BACK INTO ENGLISH

for some reason, i backed up all the weight of the world