YOU SAID:
hello, why are you here today
INTO JAPANESE
こんにちは、なぜ今日ここにいるのですか
BACK INTO ENGLISH
Hello why are you here today
INTO JAPANESE
こんにちは、今日ここにいるのはなぜですか
BACK INTO ENGLISH
Hello why are you here today
That didn't even make that much sense in English.