The Romance languages, sometimes referred to as Latin languages or Neo-Latin languages, are various modern languages that evolved from Vulgar Latin. They are the only extant subgroup of the Italic languages in the Indo-European language family. The five most widely spoken Romance languages by number of native speakers are Spanish (489 million), Portuguese (283 million), French (77 million), Italian (67 million) and Romanian (24 million), which are all national languages of their respective countries of origin. By most measures, Sardinian and Italian are the least divergent from Latin, while French has changed the most. However, all Romance languages are closer to each other than to classical Latin. There are more than 900 million native speakers of Romance languages found worldwide, mainly in the Americas, Europe, and parts of Africa. The major Romance languages also have many non-native speakers and are in widespread use as linguae francae. Because it is difficult to assign rigid categories to phenomena such as languages which exist on a continuum, estimates of the number of modern Romance languages vary. For example, Dalby lists 23, based on the criterion of mutual intelligibility. The following includes those and additional current, living languages, and one extinct language, Dalmatian: Ibero-Romance: Portuguese, Galician, Asturleonese/Mirandese, Spanish, Aragonese, Ladino; Occitano-Romance: Catalan/Valencian, Occitan (lenga d'oc), Gascon (sometimes considered part of Occitan); Gallo-Romance: French/Oïl languages, Franco-Provençal (Arpitan); Rhaeto-Romance: Romansh, Ladin, Friulian; Gallo-Italic: Piedmontese, Ligurian, Lombard, Emilian, Romagnol; Venetian (classification disputed); Italo-Dalmatian: Italian (Tuscan, Corsican, Sassarese, Central Italian), Sicilian/Extreme Southern Italian, Neapolitan/Southern Italian, Dalmatian (extinct in 1898), Istriot; Eastern Romance: Romanian, Aromanian, Megleno-Romanian, Istro-Romanian; Sardinian. Name The term Romance derives from the Vulgar Latin adverb , "in Roman", derived from : for instance, in the expression , "to speak in Roman" (that is, the Latin vernacular), contrasted with , "to speak in Latin" (Medieval Latin, the conservative version of the language used in writing and formal contexts or as a lingua franca), and with , "to speak in Barbarian" (the non-Latin languages of the peoples living outside the Roman Empire). From this adverb the noun romance originated, which applied initially to anything written , or "in the Roman vernacular". Samples Lexical and grammatical similarities among the Romance languages, and between Latin and each of them, are apparent from the following examples in various Romance lects, all meaning 'She always closes the window before she dines/before dining'. {| cellspacing="3px" | Latin || |- | Vulgar Latin ||