YOU SAID:
the quick brown fox jumped over the fat lazy dog
INTO JAPANESE
素早い茶色のキツネが太った怠惰な犬を飛び越えた
BACK INTO ENGLISH
A swift brown fox jumped over a fat lazy dog
INTO JAPANESE
足の速い茶色のキツネが太った怠惰な犬を飛び越えた
BACK INTO ENGLISH
A fast brown fox jumped over a fat lazy dog
INTO JAPANESE
足の速い茶色のキツネが太った怠惰な犬を飛び越えた
BACK INTO ENGLISH
A fast brown fox jumped over a fat lazy dog
That didn't even make that much sense in English.