Which African country has Portuguese as its official language?

Mozambique, officially the Republic of Mozambique, is a country in Southeast Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west, and Eswatini and South Africa to the south and southwest. The sovereign state is separated from the Comoros, Mayotte, and Madagascar through the Mozambique Channel to the east. The capital and largest city is Maputo.