YOU SAID:

I need a second lunch.

INTO JAPANESE

2 番目のランチが必要です。

BACK INTO ENGLISH

The second lunch is required.

INTO JAPANESE

2回目のランチが必要です。

BACK INTO ENGLISH

I need a second lunch.

INTO JAPANESE

私は二度目の昼食が必要です。

BACK INTO ENGLISH

I need a second lunch.