Thank you, and everyone in the other replies, for the explanation, I have a better understanding of the situation now. In western Europe, Belgium, we would use

Thank you, and everyone in the other replies, for the explanation, I have a better understanding of the situation now. In western Europe, Belgium, we would use 'diverse' when there are many nationalities among the attendees (ie: Italians, Moroccans, Turks, African, etc.[0]). Note that I purposely gave southern nationalities to highlight how 'diverse' is also a byword for us: we wouldn't use the word if the attendees were Norwegians, British or German (we would use 'European'). [0] Although nowadays all those people are sadly put under the broader and less subtle 'Arab' or 'Muslim' label.