One hundred fifteen languages are spoken. In the north, most people speak Arabic and some of them, like the Nubians, also speak a tribal language. In the north, people are Muslims, followers of the religion of Islam. In the south, people speak different tribal languages, and often speak Arabic or English as a second language. Many people in the south are Christians or follow traditional African religions.
People raise wheat, sorghum, dates, and vegetables for food.
They also raise cattle, sheep, goats, and chickens. The Nile River, which runs through Sudan, is the longest river in the world. Its main sources are two lakes. The Blue Nile flows from Lake Tana in Ethiopia. The White Nile flows from Lake Victoria in Uganda.