Aromanian language
By that moment in his career, Șăineanu was also publishing several books on comparative linguistics. Initially, he focused on assessing the impact of Turkish and Ottoman Turkish on the mainly Romance Aromanian language, producing the 1885 study ("Turkish Elements in the Aromanian Language"). In 1889, he published his innovative work on the links between German and Yiddish, ("A Dialectologic Study on Judeo-German Speech"). His recognized field of expertise, Nastasă notes, was by then the widest in Romania, comprising not just Yiddish and Romance linguistics, but also the study Proto-Indo-European, Proto-Slavic and various other languages and dialects.