YOU SAID:
i am going to break your kneecaps
INTO JAPANESE
私はあなたの膝帽子を壊すつもりです
BACK INTO ENGLISH
I'm going to break your kneecap
INTO JAPANESE
私はあなたの膝蓋骨を壊すつもりです
BACK INTO ENGLISH
I'm going to break your patella
INTO JAPANESE
私はあなたの膝蓋骨を壊すつもりです
BACK INTO ENGLISH
I'm going to break your patella
That didn't even make that much sense in English.