A 1949 study by Italian-American linguist Mario Pei, analyzing the degree of difference from a language's parent (Latin, in the case of Romance languages) by comparing phonology, inflection, syntax, vocabulary, and intonation, indicated the following percentages (the higher the percentage, the greater the distance from Latin): In the case of Spanish, it is one of the closest Romance language to Latin (20% distance), only behind Sardinian (8% distance) and Italian (12% distance).[11] Around 75% of modern Spanish vocabulary is derived from Latin, including Latin borrowings from Ancient Greek.[12][13]Spanish vocabulary has been in contact with Arabic from an early date, having developed during the Al-Andalus era in the Iberian Peninsula.[14][15][16][17] With around 8% of its vocabulary being Arabic in origin, this language make up the second greatest vocabulary source after Latin itself.[14][18][19] It has also been influenced by Basque, Iberian, Celtiberian, Visigothic, and by neighboring Ibero-Romance languages.[20][14] Additionally, it has absorbed vocabulary from other languages, particularly other Romance languages—French, Italian, Portuguese, Galician, Catalan, Occitan, and Sardinian—as well as from Quechua, Nahuatl, and other indigenous languages of the Americas.[21]
Despite its large number of speakers, the Spanish language does not feature prominently in scientific writing, with the exception of the humanities.[23] 75% of scientific production in Spanish is divided into three thematic areas: social sciences, medical sciences and arts/humanities. It is the third most used language on the internet after English and Chinese.[24]
Spanish is the official or national language in Spain, Equatorial Guinea, and 19 countries in the Americas. Speakers in the Americas total some 418 million. It is also an optional language in the Philippines as it was a Spanish colony from 1569 to 1899. In the European Union, Spanish is the mother tongue of 8% of the population, with an additional 7% speaking it as a second language.[27] Spanish is the most popular second language learned in the United States.[28] In 2011 it was estimated by the American Community Survey that of the 55 million Hispanic United States residents who are five years of age and over, 38 million speak Spanish at home.[29]
According to a 2011 paper by U.S. Census Bureau Demographers Jennifer Ortman and Hyon B. Shin,[30] the number of Spanish speakers is projected to rise through 2020 to anywhere between 39 million and 43 million, depending on the assumptions one makes about immigration. Most of these Spanish speakers will be Hispanic, with Ortman and Shin projecting between 37.5 million and 41 million Hispanic Spanish speakers by 2020.
