I've done a wedding like that before, the bride was mexican and the groom was turkish:
However they just wanted normal chart, pop stuff played with a few of their own cds to keep the mum and dads happy. I had them up all night quite literaly, everything I played all of them got up and was shouting, singing along-absolutaly mad (wish every party was like that

) They also had masses of food and they were all very friendly.
My advice (oh no I sound like spin

) is to ask if they want their own music played or get them to give you some sort of idea to what they want-but they may just want a normal english wedding.