“…At the same time, it is evident that the CLIL subject teacher is the response to the current demands of global education, and in addition to science education, they must have a humanitarian background of at least basic language knowledge and skills (Bicaku, 2011;Bier, 2016;Cimermanova, 2017;Fernández-Barrera, 2019;Hu & Gao, 2020;Kampen, Admiraal & Berry, 2018;Kewara, 2017;Lo et al, 2018;Papaja, 2015;Perez, 2019;Piacentini, Simões & Vieira, 2019;Ramankulov et al, 2020;Rodríguez & Saray, 2020;Vilkancienė & Rozgienė, 2017). In the global practice, the content of the educational programs in a second language does not differ from what is provided for students studying in their mother tongue (Cimermanova, 2017;Urmeneta, 2019), even though the language conditions differ significantly, which is true for any training through a non-native language (Couto-Cantero & Bobadilla-Pérez, 2018;Kunioshi et al, 2015;Lo et al, 2018;Mahan, 2020). One crucial issue is how teaching through a foreign language will affect students' knowledge, skills, and understanding of the subject as the knowledge of the non-native language of instruction is worse than that of native languages for both the student and the teacher.…”