The text under the plate is not part of the plate, it's written on the license plate holder. The car is from Germany, since 90% of cars in Eastern Europe are from Germany.
Sorry, I am an American, so I am mostly unaware of recent changes in plate design. I thought all of these were acceptable (but I just dig Malta's old plate). If you could let me know what other plates are outdated so I can update the quiz, that would be great.
These are not recent changes, most of them are +20 years outdated. Malta, Latvia, Belgium, Greece, Lithuania, Romania, Hungary, Bulgaria should have EU plates. Same with Cyprus which I don't see at all.