The article focuses on the linguistic personality of A.V. Suvorov – one of the most important historical figures famous for his military achievements, including his service and warfare in Slavic territories (military service in the Lublin region, participation in hostilities in Poland, the Battle of Brest, etc.), a prominent representative of the Russian cultural elite in the 18th century. The study employs methods of linguopersonology and historical lexicology. It aims to describe a historical language personality, viewed as a reflection of both an individual with a linguistic potential, a type of specific linguistic reflection, and of the era as a whole with its inherent linguistic features and tendencies. Processes in the language at a given time period are also manifested in the language of an individual. The study focuses on the borrowed lexis, reflecting the general instability of the Russian language system of the period, which resulted from the prevailing multilingualism of the Russian nation, a significant increase in foreign words in the Russian language, and a change in linguistic norms. Through the prism of xenolexis, the authors describe Suvorov’s language personality reflected in his letters to note his broad outlook, fluency in native and foreign languages, linguistic intuition, innovative use of units of native and foreign languages.