As well as other foreign languages learnt as second or third ones in universities, Romanian in Macedonia implies bridging, building and boosting vocabulary on etymological confluences and lexical interferences, two main modalities of favoring comprehension and of open the grammar understanding. Beginning with identification of a rich stock of words either archaical, colloquial or international, belonging to different etymological strata found in the Balkan cultures and languages such as Thracian, Latin, Slavic and Turkic, this article aims at suggesting some concepts and methods in second language acquistion that apply to Romanian as a mandatory subject at the level A1-A2 and even B1-B2. Among them contrastive analysis, etymological confluences and strata and lexical similarities have proven to be the most successful in supporting the research assumptions.