YOU SAID:
the quick brown fox ate the swan
INTO JAPANESE
素早い茶色のキツネは白鳥を食べました
BACK INTO ENGLISH
A quick brown fox ate a swan
INTO JAPANESE
素早い茶色のキツネが白鳥を食べた
BACK INTO ENGLISH
A quick brown fox ate a swan
That didn't even make that much sense in English.