ENThe article collects the forms of the three Baltic languages (i.e., Lithuanian, Latvian, and Curonian), included in two versions of P. S. Pallas’ Comparative dictionary published in 1787–1789. Mechanisms of rendering the forms of Baltic languages into Cyrillic are analyzed. In some cases, it is possible to trace the influence of Sirvydas’ dictionary on the interpretation of meaning in Pallas’ Comparative dictionary.