The CEFR and the Companion Volume to the CEFR (Council of Europe, 2001, 2020), as the main language policy documents in Europe, intend to improve the standard of language teaching, learning and assessment. These documents among other things proclaim students’ diverse linguistic repertoire as an asset in the language classroom. In this light, the promotion of multilingual education initiatives and enhancing students’ plurilingualism is an educational requirement. Teachers, language teachers included, are seen as agents of change who can foster multilingual approaches in their language classrooms (Krulatz et al., 2022). Although previous studies have found that many language teachers hold favourable views on multilingualism, they face challenges when implementing multilingual approaches in the (foreign) language classroom. Teachers’ beliefs on multilingualism in (foreign) language teaching and learning and how these impact their teaching practices have not been investigated in the Ukrainian education context, which has always been multilingual. The purpose of the article is to share and discuss the results of a quantitative study designed to investigate Ukrainian teacher beliefs in learning English and whether these beliefs are reflected in teaching practices. Data were collected using an online questionnaire administered to 73 English as a foreign language (EFL) teachers from 12 Ukrainian universities. The research questions were ascertained using descriptive statistics and Pearson correlation analysis. The collected insights helped to identify areas that require a more careful consideration in the multilingual education in Ukraine. The outcomes reveal complex and uneven relationships between teacher multilingual beliefs and the implementation of multilingual practices in EFL classrooms in Ukraine, with discrepancies in their perceptions and practices. The main finding suggests that the majority of Ukrainian language teachers have a favorable perception of multilingualism, yet they lack the required expertise and confidence to effectively build on their students' linguistic resources in teaching English. In addition, there are some critical gaps in teacher understanding of fundamental concerns about multilingualism. Suggestions will be made for a scenario-based approach to a teacher professional development course.