YOU SAID:

I'm going to break my foot off in your hind parts.

INTO JAPANESE

私はあなたの後ろの部分で私の足を壊すつもりです。

BACK INTO ENGLISH

I'm going to break my leg in the back part of you.

INTO JAPANESE

私はあなたの後ろの部分で私の足を折るつもりです。

BACK INTO ENGLISH

I'm going to break my leg in the back part of you.