the literary language was standardized, and a large number of words from Modern Latin and other Romance languages entered the lexis. In the process of language evolution from less than 2500 attested words from Late Antiquity to a lexicon of over 150,000 words in its contemporary form, Romanian showed a high degree of lexical permeability, reflecting contact with Thraco-Dacian, Slavic languages (including Old Slavic, Serbian, Bulgarian, Ukrainian, and Russian), Greek, Hungarian, German, Turkish, and to languages that served as cultural models during and after the Age of Enlightenment, in particular French. This lexical permeability is continuing today with the introduction of English words. Yet while the overall lexis was enriched with foreign words and internal constructs, in accordance with the history and development of the society and the diversification in semantic fields, the fundamental lexicon - the core vocabulary used in every day conversation - remains governed by inherited elements from the Latin spoken in the Roman provinces bordering Danube, without which no coherent sentence can be made. History Common Romanian Romanian descended from the Vulgar Latin spoken in the Roman provinces of Southeastern Europe. Roman inscriptions show that Latin was primarily used to the north of the so-called Jireček Line (a hypothetical boundary between the predominantly Latin- and Greek-speaking territories of the Balkan Peninsula in the Roman Empire). Most scholars agree that two major dialects developed from Common Romanian by the 10th century. Daco-Romanian (the official language of Romania and Moldova) and Istro-Romanian (a language spoken by no more than 2,000 people in Istria) descended from the northern dialect. Two other languages, Aromanian and Megleno-Romanian, developed from the southern version of Common Romanian. These two languages are now spoken in lands to the south of the Jireček Line. Of the features that individualize Common Romanian, inherited from Latin or subsequently developed, of particular importance are: appearance of the ă vowel; growth of the plural inflectional ending -uri for the neuter gender; analytic present conditional (ex: Daco-Romanian aș cânta); analytic future with an auxiliary derived from Latin volo (ex: Aromanian va s-cântu); enclisis of the definite article (ex. Istro-Romanian câre – cârele); nominal declension with two case forms in the singular feminine. Old Romanian The oldest extant document written in Romanian remains Neacșu's letter (1521) and was written using the Romanian Cyrillic alphabet, which was used until the late 19th century. The letter is oldest testimony of Romanian epistolary style