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-Indo-European language concerning PIE since there is no written record of the language. PIE is estimated to have been spoken as a single language from 4500 BC to 2500 BC during the Late Neolithic to Early Bronze Age, though estimates vary by more than a thousand years. According to the prevailing Kurgan hypothesis, the original homeland of the Proto-Indo-Europeans may have been in the Pontic–Caspian steppe of Eastern Europe. The linguistic reconstruction of PIE has also provided insight into the culture and religion of its speakers. As Proto-Indo-Europeans became isolated from each other through the Indo-European migrations, the Proto-Indo-European language became spoken