YOU SAID:
what are we eating for lunch
INTO JAPANESE
昼食は何を食べますか
BACK INTO ENGLISH
What do you eat for lunch?
INTO JAPANESE
昼食に何を食べますか?
BACK INTO ENGLISH
What will you have for lunch?
INTO JAPANESE
昼食は何を食べますか?
BACK INTO ENGLISH
What do you eat for lunch?
INTO JAPANESE
昼食に何を食べますか?
BACK INTO ENGLISH
What will you have for lunch?
INTO JAPANESE
昼食は何を食べますか?
it is unlikely that this phrase will ever reach equilibrium