21 Latin Phrases Every Writer Should Know

1. Persona Non Grata
   “An unwelcome person” (lately defined, by some, as a literary agent).
2. Habeas Corpus
   “You have the body” (the legal right to appear before a judge).
3. Cogito Ergo Sum
   “I think, therefore I am.” For a writer it would be “Scribo ergo sum.”
4. Deus Ex Machina
   “God from the Machine.” In a novel it basically means the author has written something too convenient to explain events, a plot device to solve the unsolvable problem.
5. E Pluribus Unum
   “Out of many, one.” Would you dare use this phrase to describe a book: “Many words, one book”?
6. Carpe Diem
   “Seize the day,” incorrectly used to describe a particular species of fish. Should not, if swapping the “a” and the “r,” be used to describe the nature of your day.
7. Quid Pro Quo
   “This for that” or, in other words, “You scratch my back, I’ll scratch yours.”
8. Non Sequitur
   “It does not follow,” a conclusion that is not connected to the statements leading up to it. For example, “Trees are made of wood. My pencil is made of wood. It’s time to finish typing my book.”
9. Ad Hominem
   “To the man.” During an argument or discussion, one party attacks their opponent’s reputation or expertise, rather than sticking to the issue at hand. A daily practice on social media.
10. Alter Ego
    Literally, “other self.” Incorrectly misspelled and then used to describe certain preachers.
11. Soli Deo Gloria
    “Glory to God alone,” a motto of the Reformation. Johann Sebastian Bach would sign his compositions with the initials S.D.G.
12. Caveat Emptor
    “Let the buyer beware” (before you use the “Buy Now” feature on any online site).
13. Pro Bono
    “Done without charge,” incorrectly used by fans of U2.
14. Memento Mori
    “Remember your mortality” (also the name of an album by the band Flyleaf).
15. Caveat Lector
    “Let the reader beware” (be nice to your reading audience!).
16. Sui Generis
    “Of its own kind” or “unique,” a key principle in copyright or intellectual property law.
17. Alma Mater
    Literally, “Nourishing mother.” More often used when referring to the school you attended. But what if you went to Alma School?
18. Veni, vidi, vici
    “I came, I saw, I conquered,” a message supposedly sent by Julius Caesar to the Roman Senate to describe a battle in 47 BC. For the writer? “Veni, vidi, scripsi” (I came, I saw, I wrote).
19. Ad Majorem Dei Gloriam
    “For the Greater Glory of God.” See 1 Corinthians 10:31. Johann Sebastian Bach also used the initials A.M.D.G.
20. Mea Culpa
    “By my fault,” or, in common language today, “My bad.”
21. Per Diem
    “Per day.” A business may give an employee a set amount of money they can spend each day while taking a trip on behalf of the company. Also known as “I can only afford a bowl of hot water and some ketchup when I travel.”