This thematic issue, entitled "Neological borrowings and their indigenous equivalents, studies tooled on corpus", brings together the reflections developed within the Franco-Czech BARRANDE and Franco-Polish POLONIUM cooperation projects, aimed at the study of neological borrowings of recent appearance in the three languages mentioned. The research carried out is based on a trilingual body of contemporary press, obtained using the Neoveille neological monitoring platform, and from other computer sources, in particular Sketch Engine.