YOU SAID:

I'll be gone in the dark

INTO JAPANESE

暗闇の中でいなくなります。

BACK INTO ENGLISH

In the dark would be gone.

INTO JAPANESE

暗闇の中がいなくなります。

BACK INTO ENGLISH

Dark 中gai will not.

INTO JAPANESE

暗い中gai はしません。

BACK INTO ENGLISH

Gai is not in the dark.

INTO JAPANESE

街は暗闇ではないです。

BACK INTO ENGLISH

The city is not dark.

INTO JAPANESE

都市は暗くはない。

BACK INTO ENGLISH

The city is not dark.