The Kingdom of Belgium has three official languages – Dutch, French and German – as well as a few non-official languages and dialects too. About 60% of the Belgian population speaks Dutch as their primary language, and is often referred to as “Flemish.” The second most spoken language is French, by about 40% of the Belgian people, with German spoken by the least number of people. The German speaking community in Belgium. If you desire an authentic Belgian name, you’ll first have to decide between Dutch, French and German. Baby Name World maintains a growing list of baby names and name meanings from all three languages.