Fundamental concept of dialect Dialect, variant of a language that differs from her in certain grammar aspects, phonetic or lexical. Geographic or regional dialect is the one that is formed in the limits of a locality, region or geographic area; social dialect is the one that speaks a grupoconcreto of people who have an analogous educative level, or belong to the same social class or the same profession. There are dialects with written norm and others queslo are oral. When a language has several dialectal manifestations and still the norm has not paid attention written, the oral dialect in which a Literature is written and developed more that excels in quality and amount will rise as language and will determine linguistic and literary the norm. It is the case of the Tuscan dialect, lingsticaitaliana variety that used geniuses of the Literature like poets Dante and Petrarca, and that prevailed on all the other dialects of Italy and became the literary norm of the country. In other cases it is a document of great social or political importance that, when publishing itself in a certain dialect becomes national norm, that is to say, the official language of a State the Eastern central dialect of Chaucer poet turned into the foundation of the English. The Castilian becomes literary norm not only for being the dialect more used by the poets, but also for political reasons. In century XIV the first orthographic unification of the Castilian like literary norm is realised, and in 1492 his is written even though first grammar by Elio Antonio de Nebrija that fixes the language, that in century XIII, king Alfonso X wrote the same in galaico-Portuguese and Castilian. To read all the complete article here original Author and source of the article..