I interviewed at the EMBL outstation in Grenoble. The entire process was in English. You have to have a good grasp of the English language and be able to explain your research in English as easily as possible. If I have one piece of advice for anyone trying to interview here - have your 3-minute elevator pitch ready for what your Master's project was about and what the biological relevance is, and make sure it is in English. You will have to explain it a lot of different times, and if you have it studied and you don't stumble, it will make a great first impression. The interview process at EMBL involves a two-step process, where in the first step, a panel of group leaders from a number of EMBL locations will ask you about your background and some basic scientific questions, which (at least in my case) were relevant to the research I was doing. Because I worked on kinases, the majority of questions they asked were in relation to it, as well as the interests I expressed in my application. If you pass this test, you will proceed to the next tier where you get to meet the different group leaders that are recruiting and learn about the projects they have on offer. The second stage involves another 30-minute interview with the recruiting group leaders, as well as another group leader that is not currently hiring, and it is a back and forth where they get to ask you questions and you get to ask them whatever it is you want to know. I was pretty set on one specific project and voiced my interest in his work in my online application. My background fit very well with the work he was doing, and I had the impression that all of the group leaders spent some time with the applications and already had a basic understanding of the backgrounds of all the applicants prior to meeting us.