Brazilian Portuguese signed into law by the President on 21 July 2008 allowing for a 6-year adaptation period, during which both orthographies co-existed. All of the CPLP countries have signed the reform. In Brazil, this reform has been in force since January 2016. Portugal and other Portuguese-speaking countries have since begun using the new orthography. Regional varieties of Brazilian Portuguese, while remaining mutually intelligible, may diverge from each other in matters such as vowel pronunciation and speech intonation. The existence of Portuguese in Brazil is a legacy of the Portuguese colonization of the Americas. The first wave of Portuguese-speaking immigrants settled in
Indigenous languages of the Americas 18th and 19th centuries, Spanish, English, Portuguese, French, and Dutch, brought to the Americas by European settlers and administrators, had become the official or national languages of modern nation-states of the Americas. Many indigenous languages have become critically endangered, but others are vigorous and part of daily life for millions of people. Several indigenous languages have been given official status in the countries where they occur, such as Guaraní in Paraguay. In other cases official status is limited to certain regions where the languages are most spoken. Although sometimes enshrined in constitutions as official, the languages may be used infrequently