YOU SAID:
芝居が始まるぞ!
INTO JAPANESE
芝居が始まるぞ!
BACK INTO ENGLISH
Let the play begin!
INTO JAPANESE
プレイを始めましょう!
BACK INTO ENGLISH
Start playing!
INTO JAPANESE
プレイ開始!
BACK INTO ENGLISH
Start playing!
That didn't even make that much sense in English.