The term 'Language of Southeast Africa' refers to the ZULU language, which is a Bantu language spoken by the ZULU people of South Africa. It is the most widely spoken language in South Africa and is one of the 11 official languages of the country. It is also spoken in parts of Zimbabwe, Lesotho, and Mozambique. ZULU is a tonal language with three tones, and its vocabulary has been influenced by other languages such as English and Afrikaans.