Through threefold, legally enforceable protection — and through the lesson of seventy years of European experience that integration does not erase cultures but makes them more visible. Ireland is more Irish today, Catalonia more Catalan and Poland more Polish than before EU accession, because cultural identity no longer has to be defended militarily and can instead be lived as civilisation.
Concretely, the Future Treaty provides: first, a cultural constitution of constitutional rank guaranteeing every official language — Russian and Ukrainian expressly included — in education, administration, media and the judiciary, enforceable before any federation court. Second, the principle of subsidiarity in absolute form: cultural, language, education and religious policy lie exclusively with the nations and regions; the federal level has no competence here whatsoever and cannot acquire it by majority vote. Third, a cultural council with veto power, in which every founding nation — regardless of its size — sits as an equal. A federation that derives its peace legitimacy from voluntariness simply cannot afford cultural dominance: it would destroy the very foundation on which it stands.