<human>: My boyfriend and I have been together for about 5 years and moved out together in January. I come from a Canadian Jewish background and he comes from a traditional Sri Lankan background. 

We have both been involved with each others parents since the beginning of our relationship. And we have both been accepted by each others parents.

My mom started hinting that she wants to meet his parents before the wedding day (were not engaged or anything she just means down the line) So I set up a date that our parents and siblings will come to our apartment for a brunch to meet (end of June) 

The issue is that I have no idea what they will talk about. They have nothing in common and my boyfriends mother doesn't speak much English. And they come from completely different cultural backgrounds. I don't need them to be best friends, I just want to create a meeting that is smooth and not painfully awkward. Does anyone have any advice on how to deal with this?

Can you give me a shortened version of the text?
<bot>: My (F21) parents and SO (M21) parents from 2 different cultures meeting for the first time during our 5 year relationship.