Just to make a point, when Joseph says it is a “Yiddishe” event with an “e”, he is using Yiddish to describe it as being a Jewish event, not an event that is supposed to be in Yiddish.
Of course the major event in NYC should have only small amounts of Yiddish, but why can there not be multiple events for people who speak different languages? I know that here in Yerushalayim, there was an event for the English-speaking population. They had different events on different days. Each to his own.