YOU SAID:

They were left to their own devices.

INTO JAPANESE

彼らは自分のデバイスに任されていました。

BACK INTO ENGLISH

They were left to their device.

INTO JAPANESE

彼らは彼らのデバイスに残された。

BACK INTO ENGLISH

They were left on their device.

INTO JAPANESE

彼らはデバイスに残された。

BACK INTO ENGLISH

They were left on the device.

INTO JAPANESE

デバイスに残っていました。

BACK INTO ENGLISH

Remained on the device.

INTO JAPANESE

デバイスに残った。

BACK INTO ENGLISH

Remained on the device.