Wikipedia
Lusitanic is a term used to categorize persons who share the linguistic and cultural traditions of the Portuguese-speaking nations, territories, and populations, including Portugal, Brazil, Macau, Timor-Leste, Angola, Mozambique, Cape Verde, São Tomé and Príncipe, Guinea Bissau and others, as well as the Portuguese diaspora generally. It is the Portugal-related equivalent of Spain-related Hispanic, and both words are most often used to refer to their respective diasporas in the Western Hemisphere specifically. Depending upon contextual usage, both may be included within the meaning of Latino.
This adjective in the English-language is derived from Lusitanian ('person of Lusitania', , fem. ; from , from , the name of a Roman province in the Iberian Peninsula, and which encompassed most of modern Portugal). remains one of the two official names of Portugal in the Latin language, especially in the Vatican State, and it was also formally and informally one of the two names used for the country in literature, cartography, and other written documents throughout Europe since the late medieval period (along with Portugal, from the Romano- Celtic place name Portus Cale). Despite having a distinct historical meaning, Lusitanian is sometimes used as a modern ethnonym synonymous with Lusitanic.
Luso- is a Late Latin prefix used to denote Portugal/Portuguese, in conjunction with another toponym or demonym.
A Lusophone is someone who speaks the Portuguese language, either natively or as an additional language. As an adjective (the Portuguese form of which is not capitalized), it means 'Portuguese-speaking'. The Lusosphere or Lusophony , is the totality of Portuguese speakers around the world, and the influence of the language and culture.