In his long scientific activity the main research concern of the academician Nicolae Corlăteanu was the contemporary literary Romanian language. Serving the cultural and social needs of a people, the literary language is the most valuable, model, exemplary form, a polished, improved form; it is the „super-dialectal” form of the national common language. Through more than six decades of hard work, the scientist examines in detail the functional relations between the national common language and its other variants: the literary language, the standard language, the writers’ language, establishing among them a concentric report. At the same time, the literary Romanian language became stabilized in the second half of the XIXth century, to its constitution contributing the spoken language from the Romanian massif of the north of Danube, the linguistic and literary tradition of the chroniclers’ books, the linguistic means of all the scholars of the three Romanian historical provinces.