I don't know how it works in Croatia, but typically a defendant must be notified of what action is being taken against them so that they can prepare a defense. Police in the USA, for example, must inform a defendant of the charges against them and provide the defendant (usually through their lawyer) all of the relevant evidence that they have. In a civil suit, the plaintiff must serve the defendant with a copy of the suit (a ritual that can become almost comical when the defendant is determined to avoid being served).
While a verdict may be handed down in absentia, typically this is when the defendant has been served and refuses to appear when summoned. I am guessing that the court will rule on the submission and decide whether the case can go forward or not. If it rules that it can, then the information would have to be sent to the defendants. For a case where the defendants are scattered around the world, that can be a challenge in and of itself, since you will want to confirm that they were served the papers. If the cost of translation was "eye watering," I can only imagine what process servers across the globe will charge.
But this assumes the court would rule that the case can go forward. That seems unlikely. I'd be surprised if it wasn't dismissed. It would be worth it if they do not dismiss it, just to see Evans panic as he realizes that he must now serve papers to seven people who live all over the planet.