Got a catering gig cooking for a Colombian family.

I just accepted this catering gig that my neighbor hired me for. It's for a wedding with a predominantly Colombian family and I'm not sure what to prepare. I'm totally unfamiliar with their native cuisine and I don't know of any restricted food ingredients that they might have. To add fuel to the fire, my neighbor told me that the Colombian women in her family are really critical, especially when it comes to food and cooking. Now I feel really nervous. To anyone who has ever been in a similar situation, I need your help!