YOU SAID:
please excuse me to go to the bathroom
INTO JAPANESE
トイレに行ってすみません
BACK INTO ENGLISH
I'm sorry to go to the bathroom
INTO JAPANESE
トイレに行ってごめんなさい
BACK INTO ENGLISH
Sorry for going to the toilet
INTO JAPANESE
トイレに行ってごめんなさい
BACK INTO ENGLISH
Sorry for going to the toilet
That didn't even make that much sense in English.