@frumguy33 – Here is the list of speakers from last Siyum HaShas:
Eli Kleinman – English
SY Rechnitz – English
Rav Shmuel Kamenetsky – English (much to the consternation of talmidim, such as myself)
Novomisker Rebbe – Mostly English
Rav Dovid Olewski – Yiddish
Rav Malkile Kotler – Yiddish
Rav Yissochor Frand – English
Jay Schottenstein – English
Rav Yitzchok Scheiner – English
Rav Yaakov Hillel – English
Rav Lau – English
As I said two Yiddish speeches, out of 11.