Public speaking is difficult for most people, but speaking publicly to an international audience is a whole other ballgame. Internationally people have different forms of speech, culture, and humor that needs to be research and understood before someone speaks in front of an international audience. Some suggested things not to do would include: trying to say phrases in a language you cannot naively speak, telling jokes, slowing down your speech, and being aware of your body language.
Read more: 7 Lessons I Learned When I Started Speaking Internationally