Reforms of Portuguese orthography

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The Portuguese language began to be used regularly in documents and poetry around the 12th century. Unlike neighboring Romance languages that adopted formal orthographies by the 18th century, the Portuguese language did not have a uniform spelling standard until the 20th century. The formation of the Portuguese Republic in 1911 was motivation for the establishment of orthographic reform in Portugal and its overseas territories and colonies. Brazil would adopt an orthographic standard based on, but not identical to, the Portuguese standard a few decades later.

Further minor spelling reforms were approved in lusophone countries over the rest of the 20th century. In 1990, a further agreement was reached between the various countries, with Portugal, Brazil, and Cape Verde adopting the new standard gradually by the beginning of 2016.