While Pope Francis has earned the reputation of being down-to-earth, salty language is not normally part of his vocabulary. But while delivering his weekly sermon from the Vatican, the pope suffered a slip-of-the-tongue as he spoke in Italian.

According to The Daily Mail report, the Argentinian native was attempting to use the Italian word "caso" which mean example. Instead, he said "cazzo" which is the F-word in Italian. The pope quickly realized his error, corrected himself and continued without comment. But by then, social media channels were overflowing with comments about the pope's unfortunate choice of words.

Many of those commenting on social media defended the pope, saying it is common for Spanish-speaking people to mix up those two words in Italian.

The Vatican had no comment on the matter.

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Waymo autonomous vehicles operate across 65 square miles inside I-285 and have been involved in six incidents with Atlanta Public School buses since May. Waymo issued a recall because of their cars briefly stopping or slowing down before continuing forward while a bus was stopped and flashing its lights. (Courtesy of Atlanta Public Schools)

Credit: Courtesy of Atlanta Public Schools