YOU SAID:
May i leave to use the restroom please?
INTO JAPANESE
トイレを使うために出発してもいいですか。
BACK INTO ENGLISH
May I leave to use the toilet?
INTO JAPANESE
トイレに行ってもいいですか。
BACK INTO ENGLISH
May I be excused?
INTO JAPANESE
もう失礼させてもらってもよろしいでしょうか。
BACK INTO ENGLISH
May I be excused?
Come on, you can do better than that.