In which of the following countries is there a Lusophone national official language?

Lusophone refers to languages that are some variant of Portuguese. The use of the term Lusophone mirrors similar terms such as Anglophone for English speakers, Francophone for French speakers, Hispanophone for Spanish speakers, and Sinophone for Chinese speakers.

The worldwide community of Portuguese speakers is known as Lusofonia or the Lusophone world (“Mundo Lusófono”). The history of the Lusophone world is intrinsically linked with the history of the Portuguese Empire and today the Lusophone community covers parts of Europe, the Americas, Africa and Asia.

There are ten sovereign states and territories that recognise Portuguese as an official national language. In all they comprise nearly 300 million people. Of these the principal Lusophone countries are Portugal, Brazil, Angola and Mozambique. Some countries, such as Luxembourg, have a substantial Portuguese-speaking minority, but do not have Portuguese as an official national language. These are not considered as Lusophone countries.

The term Lusophone derives from Hispania Lusitana, an ancient Roman province located on the Iberian Peninsula. It was named after the Lusitani, an Indo-European people. Its capital was Emerita Augusta (currently Mérida, Spain).