FNI may refer to: Fania language, spoken in Chad Fellow of the Nautical Institute Frankfurt Niederrad station, in Germany Friday Nite Improvs Fridtjof Nansen Institute, a Norwegian research institute Global Ferronickel also known as FNI International Naturist Federation (French: ) National Car Registration Record (French: ), the 1950-2009 French car registration system. Nationalist and Integrationist Front (French: ), a rebel group in the Democratic Republic of the Congo Nîmes–Alès–Camargue–Cévennes Airport, in France