YOU SAID:

today is a good day and I won't let anyone ruin that

INTO JAPANESE

今日はいい日だ 誰にもそれを台無しにはさせない

BACK INTO ENGLISH

Today is a good day, don't let anyone ruin it

INTO JAPANESE

今日はいい日 誰にも台無しにしないで

BACK INTO ENGLISH

Today is a good day, don't let anyone ruin it