The Latin alphabet, also known as the Roman alphabet, is the collection of letters originally used by the ancient Romans to write the Latin language. Largely unaltered with the exception of extensions (such as diacritics), it forms the Latin script that is used to write many modern European languages, including English. With modifications, it is also used for other alphabets, such as the Vietnamese alphabet. Its modern repertoire is standardised as the ISO basic Latin alphabet.
The term Latin alphabet may refer to either the alphabet used to write Latin (as described in this article) or other alphabets based on the Latin script, which is the basic set of letters common to the various alphabets descended from the classical Latin alphabet, such as the English alphabet. These Latin-script alphabets may discard letters, like the Rotokas alphabet, or add new letters, like the Danish and Norwegian alphabets. Letter shapes have evolved over the centuries, including the development in Medieval Latin of lower-case, forms which did not exist in the Classical period alphabet.
The Latin alphabet evolved from the visually similar Etruscan alphabet, which evolved from the Cumaean Greek version of the Greek alphabet, which was itself descended from the Phoenician alphabet, which in turn derived from Egyptian hieroglyphs. The Etruscans ruled early Rome; their alphabet evolved in Rome over successive centuries to produce the Latin alphabet.
During the Middle Ages, the Latin alphabet was used (sometimes with modifications) for writing Romance languages, which are direct descendants of Latin, as well as Celtic, Germanic, Baltic and some Slavic languages. With the age of colonialism and Christian evangelism, the Latin script spread beyond Europe, coming into use for writing indigenous American, Australian, Austronesian, Austroasiatic and African languages. More recently, linguists have also tended to prefer the Latin script or the International Phonetic Alphabet (itself largely based on the Latin script) when transcribing or creating written standards for non-European languages, such as the African reference alphabet.