In Bessarabia of the nineteenth century there were no schools of linguistics like in Pricipats, nor Romanian press, not even a school teaching in Romanian. At graduation Romanian-speaking students became bilingual. However, in those conditions of diglossia imposed after 1812, when only the Russian language was used in all social spheres while Romanian was used only in colloquial sphere or in the family, Bessarabian intellectuals Stefan Margela, Iacob Ghinculov, Ioan Doncev realized the importance of promoting the Romanian language in those social-cultural unfavourable conditions (I. Ghinculov and I. Doncev taught the Romanian language in Russian!). Through their grammar books they established some rules, which elucidated the state of the Romanian language in Bessarabia. At the same time, each of them contributed to the creation of natural norms of the literary Romanian language.