The official language of the Vatican is Latin. While Latin serves as the primary language for official documents and communications, Italian is also widely used in everyday interactions within the Vatican City. The use of Latin reflects the historical and religious significance of the language within the Roman Catholic Church, as it was the language of the Roman Empire and has been used in liturgy and theological writing for centuries. Knowledge of Latin is often essential for clergy and scholars studying church texts, canon law, and the rich traditions of Catholic doctrine and worship.