YOU SAID:
I fell on my cat this morning and now my leg hurts
INTO JAPANESE
今朝、猫に落ちて、足が痛い
BACK INTO ENGLISH
I fell on a cat this morning and my legs hurt
INTO JAPANESE
今朝猫に落ちて足が痛い
BACK INTO ENGLISH
I fell on a cat this morning and my legs hurt
That didn't even make that much sense in English.