Koreans have developed a fondness for Red Bean ice cream, while the Japanese prefer Green Tea ice cream. Sheep's eyes, monkey brains, gorilla hand and snake sound totally repugnant to most Americans, yet they are delicacies in other countries. Like the fortune cookie, they may even be American inventions. When serving the food of their culture to international delegates, use a caterer who understands the cuisine of that culture and can provide you with authentic dishes. Otherwise, serve American food.
Airlines do it all the time.
Most caterers will be happy to work with you, especially if you give them sufficient notice and work out the logistics of the service. It helps the waitstaff if everyone requiring a certain type of meal is seated together, but that is not always possible. A detailed seating plan then becomes essential. At a recent event for 60 people, the hosts ate no red meat. Rather than settle for chicken, they opted for a pasta appetizer with a salmon entree.