Professor of Applied Linguistics and Head of the Department of Studies on Multilingualism at the Adam Mickiewicz University in Poznań (Poland). In 2012-2016 the Vice-Dean and in 2016-2020 the Dean of the Faculty of Modern Languages and Literatures. My research interests are related to language development in various contexts, i.e. first language acquisition, bilingual language acquisition, second language acquisition, child successive language acquisition, foreign language acquisition in school settings.