In this scientific work will be followed and evaluated the contribution of albanologists and foreign Balkanology scholars who study the dialect of the Arbanasi of Zadar - this small portion of dialect, necessarily separated from the trunk of the Albanian language in the first half of the XVIII century, but partially preserved to this day. In the light of learning and studying this linguistic matter, closely related to sociolinguistic, educational, historical, political factors, etc., it is important to see the first attempts and achievements of these linguistic traces, which belong to three foreign linguists: Slovenian professor Franz Miklosich, German professor Gustav Weigand and Italian professor Carlo Tagliavini. In this study, however, will be treated some modest but precious efforts of these three scholars who contributed for the isoglosses of the dialectal area of the Arbanasi of Zadar, which this means they contributed for the Albanian language at a time when the first chapters of the Albanian language studies and its importance within the Balkan and comparative linguistics had just been drawn up and aligned. The works of the aforementioned linguists, published in foreign languages, such as German and Italian, besides their considerable scientific weight, they also had historical echoes since the marked an affirmation for the Albanian language and Albanians even in international relations.