What is the Latin word for motto?
A motto (derived from the Latin muttum, 'mutter', by way of Italian motto, 'word' or 'sentence') is a sentence or phrase expressing a belief or purpose, or the general motivation or intention of an individual, family, social group, or organisation.
Why are mottos in Latin?
It's in Latin because back in the 19th century that language was much more widely taught and used than it is today. It probably goes back to the days when kings and queens and other big shots had coats of arms with the family motto in Latin.