Everything was in English language, basic questions, there were 2 persons interviewing me, you can have face to face or webex interview (skype), first they called me asked me basic questions in slovak language, then they tried my english i took about 15 mins, then I got invitation for second interview, I chose face to face in Bratislava, speaking just in English, this took about 45 mins, then another interview, took about 30 mins, it was in english and unspecified (cant tell you) language, my position was about two languages, they wanted to try my second language, if I can read and speak