YOU SAID:

surprises don't hide until and unless of expectations.

INTO JAPANESE

予期しない限り、驚きは隠されません。

BACK INTO ENGLISH

No surprise is hidden unless you expect it.

INTO JAPANESE

期待しない限り、驚きは隠されません。

BACK INTO ENGLISH

Unless you expect it, you won't be surprised.

INTO JAPANESE

予期しない限り、驚くことはありません。

BACK INTO ENGLISH

Don't be surprised if you don't expect it.

INTO JAPANESE

期待していなくても驚かないでください。

BACK INTO ENGLISH

Don't be surprised if you don't expect it.