True, the sister is merely acting as a linguistic intermediary. That is to say, the teaching is not her own but that of the brother for whom she is interpreting.
ही भगिनी केवळ वक्त्याने सांगितलेली माहिती दुसऱ्‍या भाषेत व्यक्‍त करण्याचे माध्यम असते.