YOU SAID:
You know what they say about big feet
INTO JAPANESE
彼らは大きな足について何を言うのか知っている
BACK INTO ENGLISH
They know what to say about big legs
INTO JAPANESE
彼らは大きな足について何を言うべきかを知っている
BACK INTO ENGLISH
They know what to say about big legs
Come on, you can do better than that.