Kenya is the most ethnically diversed country in East and central Africa

This is followed by Nigeria alone ....

Kenya and Nigeria form the conversion point for major african ethnicity

Like
Bantus
Cushites
Nilotes
Etc

From the picture below shows major african lingual groups conversion within africa Kenya and Nigeria have more than 5 groups of ethnicities converging

sijakuelewa, inaelekea ni shule nzuri lakini sijakuelewa.