YOU SAID:
What was you favorite part of dinner?
INTO JAPANESE
あなたは夕食の好きな部分は何でしたか?
BACK INTO ENGLISH
What was your favorite part of dinner?
INTO JAPANESE
あなたの好きな夕食は何ですか?
BACK INTO ENGLISH
What is your favorite dinner?
INTO JAPANESE
あなたの好きな夕食は何ですか?
BACK INTO ENGLISH
What is your favorite dinner?
That didn't even make that much sense in English.