YOU SAID:

I wonder what we are having for dinner tonight.

INTO JAPANESE

今夜の夕食は何を食べているのかしら。

BACK INTO ENGLISH

I wonder what to eat for dinner tonight.

INTO JAPANESE

今夜の夕食は何を食べないか。

BACK INTO ENGLISH

What shall we have for dinner tonight?

INTO JAPANESE

今夜の夕食は何を食べましょうか。

BACK INTO ENGLISH

What shall we have for dinner tonight?