I've done 5 presentations in front of hundreds of people in the past 2 weeks (school opening). Go slow. Go very slow. Switch words. No one knows your speech. Only you know. If you say "food" instead of "meals" no one knows. If you pause, you look powerful. No one knows your speech. Only you. Feel your gut and do what needs to be done. But keep in mind, no one else is giving it but you. 99% of people are terrified of speaking. If you go up and do a so-so job you just demolished all the cowards in the seats.