Polonisms are loanwords from Polish into other languages.
Polonisms are the second largest group of loanwords in Ukrainian. Polish also served as a mediator of borrowings from German into Ukrainian (for example, 'to cost': Ukrainian: 'koshtuvaty', from Polish: 'kosztować', from German 'kosten')Yuri Zoria, Ukraine’s European heritage is in its language’s DNA, Euromaidan Press
In Lithuanian language, Polonisms are much more recent stratum than borrowings from East Slavic (Ruthenisms), as Lithuanians made close contact with East Slavs than with Poles.Anželika SMETONIENĖ, Suffixed Slavic Loan Verbs and Hybrids of the Lithuanian Language (in the XVI-XVII c. texts of the Grand Duchy of Lithuania) See also List of English words of Polish origin Wiktionary:Category:Terms derived from Polish by language
References
Further reading Lietuvių kalbos polonizmų žodynas (Dictionary of Lithuanian Language Polonisms) Jamila A. Gadimova, On the question of levels of adaptation of polonism in Russian language, Krakowskie Studia Małopolskie, 2024, nr 2 (42), pp.105-119 Dorota Paśko-Koneczniak, Polonizmy dawne funkcjonujące w rosyjskiej gwarze staroobrzędowców mieszkających w Polsce [Old Polonisms in the Russian Dialect of Old Believers in Poland] Alena Rudenka, among the Belarusian Names of Cognitive Events, Studia Bialorutenistyczne 14/2020, pp. 249-268,