"On each side of the river stood the tree of life, bearing twelve crops of fruit, yielding its fruit every month. And the leaves of the tree are for the healing of the nations."
Revelation 22:2 & 3
Imagine living with people of all nations, all races, in heaven. What of our former bias? What do we do with our natural propensity toward clannishness? Will there be a language barrier or other social differences? Will we segregate into groups, hanging around with our "own kind"?
The Bible says God will make all things new! There will no longer be any curse so we will be able to get along with anyone because the common denominator will be the Holy Spirit of our Savior. Think of the leaves of that tree as the fruits of the Spirit: love, joy, peace, patience, kindness, gentleness and self control. The past will be healed and we will carry on a conversation with anyone, no interpretors needed.