Thank you very much for raising this very interesting and important topic at the webinar. My personal interest in this was the use of L1 in EFL . As for EMI the main thing is to understand that English is a medium for gaining knowledge, for growing . Thank you for lots of useful tips and materials. English, as a means not only a goal, along with translanguaging is also crucial in EFL. L1 in EMI and in EFL is unavoidable at initial stages , but its use should be purposeful and never chaotic both in instruction and in learning. At hihger levels it's good in Literature classes us especially in poetry using masterpiece translations. Thank you for ideas.