Start by discussing dietary restrictions and preferences with your partner. Make a list of any allergies, intolerances, or dietary restrictions that need to be taken into consideration.

Research popular dishes from each nationality represented in the group. Consider dishes that are easily customizable to accommodate different dietary needs.

Choose a main dish that is versatile and can be easily adapted to suit different tastes. For example, a build-your-own taco or stir-fry bar allows guests to choose their own ingredients.

Include a variety of side dishes that cater to different tastes and dietary needs. This could include a salad, roasted vegetables, rice, or bread.

Offer a selection of beverages that are popular in each nationality, such as tea, coffee, or traditional beverages.

Consider dessert options that are universally enjoyed, such as fruit platters, cookies, or ice cream.

Set up a buffet-style meal so that guests can serve themselves and choose the dishes that appeal to them.

Make sure to label each dish with its ingredients to help guests with dietary restrictions easily identify what they can and cannot eat.

Encourage guests to try a little bit of everything and be open to experiencing new flavors and cuisines.

Finally, enjoy the meal together and celebrate the diversity of cultures and cuisines represented in the group.