During the 19th century, French nationalists gave a privileged significance to their descent from the Gauls. The struggles of Vercingetorix were portrayed as a forerunner of the 19th-century struggles in defence of French nationalism, including the wars of both Napoleons (Napoleon I of France and Napoleon III of France). Basic French history textbooks emphasised the ways in which Gauls (""Nos ancêtres les Gaulois..."", 'our ancestors the Gauls') could be seen as an example of cultural assimilation. In the late Middle Ages, some French writers believed (incorrectly) that their language was primarily Celtic, rather than Latin. A similar use of "Celticity" for 19th-century nationalism was made in Switzerland, when the Swiss were seen to originate in the Celtic tribe of the Helvetii, a link still found in the official Latin name of Switzerland, "Confœderatio Helvetica", the source of the nation code CH and the name used on postage stamps (Helvetia).