YOU SAID:
who are they that tell him he is she?
INTO JAPANESE
彼は彼が彼女だと言っている人は誰ですか?
BACK INTO ENGLISH
Who is he telling him that he is her?
INTO JAPANESE
彼は彼が彼女であると誰に教えているのですか?
BACK INTO ENGLISH
Who is telling him that he is her?
INTO JAPANESE
誰が彼が彼女であることを彼に伝えているのですか?
BACK INTO ENGLISH
Who is telling him that he is her?
That didn't even make that much sense in English.