About Portuguese
Portuguese is a Romance language that originated from a fusion of the dialect spoken in what is now Galicia and northern Portugal with closely related dialects spoken in territories to the south which had not yet been reconquered by the Christians to the Arabs by the time Portugal was born as a Christian kingdom in the Iberian Peninsula (first half of the 12th century).

Portuguese is a pluricentric language with two main groups of dialects, those of Brazil and those of the Old World. For historical reasons, the dialects of Africa and Asia are generally closer to those of Portugal than the Brazilian dialects, although in some aspects of their phonetics, especially the pronunciation of unstressed vowels, they resemble Brazilian Portuguese more than European Portuguese. They have not been studied as widely as European and Brazilian Portuguese.

source: Wikipedia