The whole interview is in english, there are many questions about object oriented programming. The interview takes place on their web application and there is one simple coding question. You also have to say something about yourself at the beggining.

Good, asked core java questions, made some tasks with streams and simple question about web dev. It was engaging and positive interview, checking your problem solving with theoretical knowledge. Main topics were OOP (Classes, poly, interfaces etc), Collections, Exceptions and other core topics + design patterns and basic git and spring related questions.