One of the central elements of the nation-building process in the 19th century wasthe attempt to homogenize the citizenry, i.e. to fabricate national citizens. Besidesthe military and church, schools were considered to be the main agencies capable ofachieving this national homogenization. In this paper, focusing on the education inSwitzerland and France, I argue that elementary mathematics education was alsoused for this particular purpose. I make the case that throughout the 19th centurymathematics education became a way to familiarize the people with a standardizedlanguage – a language that was supposed to help them master their specific social,cultural and political realities.Key words: mathematics education; nation building; Standard Language Ideology;state formation.