If he has a list by now, you can check the list. If NONE of the schools on the list will give him credit, probably not worth signing up. However, if any of them do give credit, makes sense to at least sign up for the test and pay the money. He can always decide not to take it or to just wing it in the spring if he signs up for it. Only my kid that majored in international relations had a foreign language requirement that could not be met by taking language courses in HS.