YOU SAID:

I'm going to the store. I'll be right back.

INTO JAPANESE

私は店に行きますよ。すぐ戻る。

BACK INTO ENGLISH

I'm going to the store. Right back.

INTO JAPANESE

私は店に行きますよ。すぐに。

BACK INTO ENGLISH

I'm going to the store. Soon.

INTO JAPANESE

私は店に行きますよ。すぐに。

BACK INTO ENGLISH

I'm going to the store. Soon.