YOU SAID:
Hello may I use the washroom?
INTO JAPANESE
こんにちは、お手洗いを使ってもいいですか?
BACK INTO ENGLISH
Hello, may I use the restroom?
INTO JAPANESE
こんにちは、トイレを使ってもいいですか?
BACK INTO ENGLISH
Hello, may I use the restroom?
You've done this before, haven't you.