YOU SAID:

I will be eating that which wants to be having dinner with me

INTO JAPANESE

一緒に夕食を食べたいものを食べる

BACK INTO ENGLISH

Eat what you want for dinner together

INTO JAPANESE

一緒に夕食で好きなものを食べよう

BACK INTO ENGLISH

Let's have dinner together and eat whatever we want.

INTO JAPANESE

一緒に夕食を食べて、好きなものを食べよう。

BACK INTO ENGLISH

Let's have dinner together and eat what we like.

INTO JAPANESE

一緒に夕食をとり、好きなものを食べましょう。

BACK INTO ENGLISH

Let's have dinner together and eat what we like.