Answer:
A tribe is generally referred to a bunch of people who shares a common language, and practices same culture and believes in common religion.
Explanation:
They share common ethical values and they have defined societal values; they speak a common language know as mother tongue, they may or may not follow the same religion. They have common cultural beliefs.
They almost have the same anthropological origin. In some situations, they overlap with the nations, it is most commonly seen in European countries. Example, in England they speak a common language called English, they have similar culture and the religion they follow may or may not be the same.