European Union (EU) citizenship by investment allows individuals to gain EU citizenship through financial contributions in countries like Malta, Austria, and Bulgaria. Naturalization options are available in several countries, including Argentina, where individuals can apply after 2 years of residency, and France, which requires 5 years. The UK offers citizenship after 5 years of residence, including a language test and knowledge of British culture. Ireland provides citizenship after 5 years, with proficiency in English or Irish. Uruguay grants citizenship after 3 years of residency, while Mexico requires 5 years and proficiency in Spanish. Portugal and Italy offer citizenship through residency, with 5 and 10 years of legal residence, respectively, and a requirement for basic language skills. In all cases, becoming a citizen of an EU member state grants the right to live, work, and travel across the EU. For further guidance on EU citizenship programs, you can visit EU Citizen.