Just a small issue, valid if your audience is mixed language. Of course, talking slowly and clearly is a must. But in case there might be persons that would require a different language, this must be checked out first. Especially in europe, it could happen that the presenter has to be able to switch from his native language to english. The main trap that most fall into is that they ask “does everybody understand xyz, or shall I switch to english?” in their native language!. Of course, the attendees not from there will not understand the question and therefore will not have a chance to get the message of the whole presentation. This has to be considered especially in multinational companies, and is often overlooked…So if you are able and willing to present in a more commonly understand language, pose the question in that one, being it english, german, french, mandarin, whatever…
