YOU SAID:
A quick brown fox jumps under the lazy dog
INTO JAPANESE
素早い茶色のキツネが怠惰な犬の下に飛び込みます
BACK INTO ENGLISH
A swift brown fox dives under a lazy dog
INTO JAPANESE
足の速い茶色のキツネが怠惰な犬の下に飛び込みます
BACK INTO ENGLISH
A swift brown fox dives under a lazy dog
That didn't even make that much sense in English.