Even though South Africa has 11 official languages, English is the most official language in South Africa. When speeches are delivered by public officials, they are 99% in English. All official documents have English in it. Even the government official website is in English [1]. It is the only compulsory language at school. All private and urban schools teach English as a first language, then other languages as additional languages. Parents this side make sure their kids can speak English before they speak their own indigenous languages. Not mine though.

[1] https://www.gov.za/welcome-official-south-african-government...