where does saying when in rome come from
When in Rome, do as the Romans do Saint Monica and her son, Saint Augustine, found out that Saturday was observed as a fast day in Rome, where they planned to visit. It was not a fast day in Milan, where they lived. They consulted Saint Ambrose who said "When I am here (in Milan) I do not fast on Saturday, when in Rome I do fast on Saturday." That reply is said to have brought about the saying "When in Rome, do as the Romans do."[4][5]
Languages of the Roman Empire After the decentralization of political power in late antiquity, Latin developed locally in the Western provinces into branches that became the Romance languages, including Spanish, Portuguese, French, and Italian. In the early 21st century, the first or second language of more than a billion people derived from Latin.[14] Latin itself remained an international medium of expression for diplomacy and for intellectual developments identified with Renaissance humanism up to the 17th century, and for law and the Roman Catholic Church to the present.