What about giving a Shiur or Dvar Torah in Loshon Kodesh? The reason that was not done is because Loshon HaKodesh is very hard to use in a speaking manner – its much more suited to writing. Would you start a sentence with “hinei”?
It would be an interesting experiment to spend a month speaking nothing but Loshon Kodesh, possibly limiting it to actual verses from the Tanach.