For adults it is easy to move across the EU: you can work and socialise using in English.
But for children, and families, it is impossible. How can a child move and be expected to learn a new language immediately?
This seems like a huge disconnect. National governments need to start to offer (for parents that opt-in) primary and secondary education in English, with the entire curriculum and exams in that language as well.
Universities degrees are already offered in English, and at the very least fluency in the language is required to study most courses, since all of the articles, case studies and reference materials are in that language. It is time that that same flexibility was extended to the earlier years of education.