Almost all of Vatican City's 826 (2009 est.) citizens either live inside the Vatican's walls or serve in the Holy See's diplomatic service in embassies (called "nunciatures"; a papal ambassador is a "nuncio") around the world. The Vatican citizenry consists almost entirely of two groups: clergy, most of whom work in the service of the Holy See, and a very few as officials of the state; and the Swiss Guard. Most of the 3,000 lay workers who comprise the majority of the Vatican workforce reside outside the Vatican and are citizens of Italy, while a few are citizens of other nations. As a result, all of the City's actual citizens are Catholic as are all the places of worship.
Vatican City has no set official language. Unlike the Holy See, which most often uses Latin for the authoritative version of its official documents, Vatican City uses Italian in its legislation and official communications. Italian is also the everyday language used by most of those who work in the state. In the Swiss Guard, German is the language used for giving commands, but the individual guards take their oath of loyalty in their own languages, German, French, Romansh or Italian. Vatican City's official website languages are Italian, English, French, German, and Spanish. (This site should not be confused with that of the Holy See, which uses all these languages, along with Portuguese, with Latin since 9 May 2008 and Chinese since 18 March 2009.)