Reply To: Yiddish at Siyum hashas

I assume Rav Kotler from Lakewood speaks English even though he grew up in EY but subsequently left his family there and came to the U.S. in the early 1980s to become Rosh Yeshiva of BMG when his father was niftar. Someone may know more details but it may just be his preference to do his presentation at the siyum in Yiddish as I assume he does for all his BMG shiurim and schmoozes.