Upvote:0
I know that German does. When Francis Joseph became Austrian emperor in 1848, the year of revolutions, there was a joke that the "wir" or "we" in his proclamations stood for Windischgraetz, Jellac, and Radetsky, three generals fighting the rebels. But German is closer to English than French is. The Wikipedia article indicates the royal we is widespread in Europe.
https://en.wikipedia.org/wiki/Royal_we1
And here is a discussions that mentions its use in French, Spanish, German:
https://forum.wordreference.com/threads/majestic-plural-or-the-royal-we-pluralis-majestatis.1091632/2
And this site says:
Queen Elizabeth I certainly used it, as did many Russian rulers and French rulers.
http://www.wisegeek.com/what-is-the-royal-we.htm3
Thus I think nous would be used as the royal we in French.