YOU SAID:

The key to this door cannot be spoken lest it break

INTO JAPANESE

このドアの鍵は壊れないように話すことはできません

BACK INTO ENGLISH

You can't talk about the key to this door so it won't break.

INTO JAPANESE

このドアの鍵が壊れないように話すことはできません。

BACK INTO ENGLISH

You can't talk about this door key so it won't break.

INTO JAPANESE

このドアの鍵が壊れないように話すことはできません。

BACK INTO ENGLISH

You can't talk about this door key so it won't break.