Some of your group may participate in a language that is not their native tongue. If their vocabulary or pronunciation is difficult for others to understand, you can bridge the gap by clearly repeating their comments and contributions. New-comers bring fresh perspective. Old-timers have experience and wisdom. Be liberal with your compliments and praise.
Trainers are often widely experienced and well-traveled.
The can bring good value to the group, but don't highlight your differences too much. You want respect, not distance. If possible, use local language, customs and examples in your presentation. This may require some preparation on your part, but it can make a very big impact on your group. Towards the end of the Cold War, comedian Billy Crystal began a stand-up routine in Moscow by conducting the first five minutes entirely in Russian.