The Catholic title is “The Apocalypse of St. John.” The translation of “Apocalypse” to Revelation is a bit clumsy, inasmuch as that’s also a collective noun used to describe the entire bible. At the same time, the Apocalypse consists of several individual revelations. Catholics have adopted the more anglicized, Protestant titles of biblical books since Vatican II, so we do speak of “Revelation,” but once in a while a little discrimination between Revelation, and Revelations still pops out.
Understood. It’s a pet peeve of mine when folks don’t get the name of the book correct. The book starts out with the greek word “apokalupsis” - The apocalypse or unvealing of Jesus Christ, given to Him by the Father. I’m not saying this about you, but it irritates me to read liberal “Bible Scholars” criticizing Revelation and they don’t even get the name of the book correct.