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 Shona Language
According to Wikipedia.org, Shona is a Bantu language and is spoken by the Shona people of Zimbabwe. The language was codified by the colonial government and became popular during the 1950s. According to Ethnologue, the language was spoken in the Zezuru, Korekore, and Karanga dialects. It is spoken by 7.5 million people. Shona has Manyika and Ndau dialects and is spoken by 1,025,000 and 2,380,000 people. It is called Shona and is similar to the Ndau (Eastern Shona) and Karanga (Western Shona). Shona is a written standard language and became popular in the early 20th century. In the 1920s, the Rhodesian administration offered schoolbooks and other materials in Shona. The first novel in Shona was published in 1957. It is taught in the schools and has literature in the monolingual and bilingual dictionaries. The Standard Shona has a specific dialect and is spoken by the Karanga people of Masvingo Province. Shona dialects are taught in local schools.