Additionally, for the 99.9% who are not Talmidim of your Rav, even knowing what to look for would be absolutely forbidden.
I personally find it very challenging to answer Shailos and deliver Shiurim in Yiddish and Ivrit (both Ashkenazi and Sefardi pronunciations). Neither are my native language, and the risks of misunderstandings are multiplied. I am careful to take precautions to avoid errors.