French was a spoken and written language originating from France. In addition, it was one of two predominant languages spoken in the African country of Sangala, along with English.
Paula Schaeffer had a partition on her CTU system under the name "Etudes," which is French for "study." ("Day 2: 12:00pm-1:00pm")
After Larry Moss alerted Zeze Eto'o of an impending attack on Prime Minister Ule Matobo's residence, he and the other guards warned Matobo and his wife in French, ordering them to take shelter in the residence's panic room. ("Day 7: 11:00am-12:00pm")