The population comprises approximately 73 ethnic groups, most of which are Bantu-speaking. Almost 90% of Zambians belong to the nine main ethnolinguistic groups: the Nyanja-Chewa, Bemba, Tonga, Tumbuka, Lunda, Luvale, Kaonde, Nkoya and Lozi. In the rural areas, ethnic groups are concentrated in particular geographic regions. Many groups are small and not well known. However, all the ethnic groups can be found in significant numbers in Lusaka and the Copperbelt. In addition to the linguistic dimension, tribal identities are relevant in Zambia. These tribal identities are often linked to family allegiance or to traditional authorities. The tribal identities are nested within the main language groups.