@freemo ducking is somewhat warranted :P but we still have an age limit of ... 10 I'd say where kids in Europe start to understand English properly. My first choice wouldn't be English, tho, but for the sake of easier path to standardization I would probably vote for it to become the primary language in Europe with secondary being the original one of that country. European people of culture will probably hate me if they stumble upon this post, lel.