Planning a wedding soon and need some advice.

I'm working full time as an event planner and one of my clients referred me over to a group of Ukraine women from her pilates class. One of them is getting married early next year and the other girls are going to be her bridesmaids. I don't really know much about what the dating or marriage culture is like in the Ukraine and I want to avoid planning any activities or saying anything that might be offensive to them. Anything I should know before I start working on the upcoming wedding ceremony? Thanks!