Since the 13th century, Monaco was ruled by the Genoese Grimaldi family, who originated from the Republic of Genoa, which is located in present-day Italy. However, Monaco gradually came under the influence of France and adopted French culture and customs, including the French language.
In 1861, Monaco became an official protectorate of France, which meant that France provided military protection to Monaco and handled its foreign relations. This close political and military relationship with France further strengthened the use of French in Monaco.
In 1911, Monaco adopted a new constitution, which declared French as the official language of the country. Today, French is the primary language used in government, education, media, and everyday communication in Monaco.
Although there are other languages spoken in Monaco, such as Monégasque, Italian, and English, French remains the dominant language and the lingua franca of the country.