About Igbo Language
According to Wikipedia.org, Igbo is a prominent language among the Igbo natives. These natives belong to the ethnic group that resides in Eastern Nigeria. This language is termed 'Igbo izugbe' and was officially adopted in 1972. The foundation of this language is based on various dialects. It includes Owerri (Isuama), Anambra (Awka) and Umuahia (Ohuhu). Many other languages are related to the Igbo language. The list includes Ika, Ukwuani, and Ogba. All these are also considered as the dialects of Igbo. There are around 42 million native speakers of Igbo. You will be surprised to see that the writing system is quite innovative. Most of it is written in Latin alphabets. It is the official language of Nigeria but is spoken by other people in the world too.
About Swahili Language
According to Wikipedia.org, Swahili is a popular Bantu language that is spoken in Tanzania, Uganda, and Kenya. It is also widely spoken in Burundi, Mozambique, Oman, Somalia the Democratic Republic of the Congo, and South Africa. The total number of native speakers is 98 million. According to a survey in 2012, there are about 47 million speakers in Tanzania and around 34 million in Uganda. You will be surprised to know that there is a small number of speakers in other parts of the world. Swahili is written in the Arabic script and is very much influenced by the Latin alphabet. There are plenty of dialects of Swahili but the modern standard Swahili is based on Kiunguja. Some old dialects include Maho that is distinctive from other dialects. Kimwani is another dialect that is majorly spoken in Mozambique.