Lusophone Language Countries, similar to the Francophonie. Notes: Lusophone Lusophones () are people who speak the Portuguese language, either as native speakers or as learners. Similarly, the Lusosphere or Lusophony () is a community of people who are culturally and linguistically linked to Portugal, either historically or by choice. The idea of a Lusosphere is free of ethnic connotations, in that a Lusophone may not have any Portuguese ancestry at all. The Lusophone world is mainly a legacy of the Portuguese Empire, although Portuguese diaspora and Brazilian diaspora communities have also played a role in spreading the Portuguese language. Even after
Proto-language system of isoglosses which held together dialects which were spoken by various tribes, from which the historically attested Indo-European languages emerged. Proto-language A proto-language, in the tree model of historical linguistics, is a language, usually hypothetical or reconstructed, and usually unattested, from which a number of attested known languages are believed to have descended by evolution, forming a language family. In the strict sense, a proto-language is the most recent common ancestor of a language family, immediately before the family started to diverge into the attested "daughter languages". It is therefore equivalent with the "ancestral language" or "parental language" of