Monarchy was abolished on 30 December 1947 upon the proclamation of the People's Republic and was changed with the new constitution upon its adoption on 21 August 1965 as the Socialist Republic. The Communist regime fell on 22 December 1989, the new democratic government was installed on 20 May 1990 and the new post-communist constitution was adopted on 21 November 1991. Romania joined the European Union on 1 January 2007.
The oldest known surviving document written in Romanian, a 1521 letter known as the "Letter of Neacșu from Câmpulung", is also notable for including the first documented occurrence of the country's name: Wallachia is mentioned as Țeara Rumânească (old spelling for "The Romanian Land"; țeara from the Latinterra, "land"; current spelling: Țara Românească).
Two spelling forms: român and rumân were used interchangeably[a] until sociolinguistic developments in the late 17th century led to semantic differentiation of the two forms: rumân came to mean "bondsman", while român retained the original ethnolinguistic meaning. After the abolition of serfdom in 1746, the word rumân gradually fell out of use and the spelling stabilised to the form român.[b]Tudor Vladimirescu, a revolutionary leader of the early 19th century, used the term Rumânia to refer exclusively to the principality of Wallachia."
The use of the name Romania to refer to the common homeland of all Romanians—its modern-day meaning—was first documented in the early 19th century.[c] The name has been officially in use since 11 December 1861.
In English, the name of the country was formerly spelt Rumania or Roumania.Romania became the predominant spelling around 1975.Romania is also the official English-language spelling used by the Romanian government. A handful of other languages (including Italian, Hungarian, Portuguese, and Norwegian) have also switched to "o" like English, but most languages continue to prefer forms with u, e.g. French Roumanie, German and Swedish Rumänien, Spanish Rumania (the archaic form Rumanía is still in use in Spain), Polish Rumunia, Russian Румыния (Rumyniya), and Japanese ルーマニア (Rūmania).