Dr. des. Kateryna Iefremenko is a researcher in the DFG funded CRC 1412 Register / Project C03 “Real-time register comprehension in adolescent heritage speakers’ languages”. She is also a member of the DFG Research Unit "Emerging Grammars in Language-Contact Situations: A Comparative View" (RUEG)/ P9 Dynamics of discourse organisation in language contact at Potsdam University.

Her interests encompass multilingualism, heritage languages, language production, language acquisition, and language processing. Specifically, her research focuses on such languages as Turkish, Kurmanji Kurdish, Ukrainian, Russian, German, and English.