YOU SAID:

OK, well I can't tell you right now, because it'll ruin the surprise.

INTO JAPANESE

そうですね、サプライズが台無しになってしまうので、今は言えません。

BACK INTO ENGLISH

Well, I can't tell you right now because it would ruin the surprise.

INTO JAPANESE

まあ、サプライズが台無しになってしまうので、今は言えません。

BACK INTO ENGLISH

Well, I can't tell you right now because it would ruin the surprise.