"Maybe he's English also not good, like everyone else in the tournament? "
Yes, but that's only a part of the explanation. When I first saw the letters, I didn't know that English feelwords existed. Thinking it was the usual stuff, I immediatly closed the window and began another activity. After maybe 3 or 4 minutes, I realised that I hadn't seen any cyrillic letter. I went back on the page and I realised it was english feelwords.
Then only my english skill was not high enough to solve the problem in time (Found 1/3 of the words before the end of the round).