French language
French was a major language of Earth, primarily spoken in France, but also popular in other regions, such as New Orleans and several African countries. A notable native speaker was Captain Jean-Luc Picard.

NATO was called "OTAN" in French. ()

In 2000, when Shannon O'Donnel had dinner with Henry Janeway in a supposedly Parisian setting, Shannon commented that, unfortunately, she didn't speak French, so Henry would have to make the dinner arrangements. ()

In 2152, Hoshi Sato answered an offer by Ravis to visit a steam pool on Risa, "Avec plaisir" ("With pleasure"). ()

In 2154, when Sato was delirious due to infection by a silicon-based virus, one of numerous languages she was heard speaking was French. ()

When the  encountered the  lifeform in 2257, what appeared to be a computer virus caused the universal translator to translate the crew's speech into a chaotic cacophony of languages. As the problem began, Captain Christopher Pike was surprised to hear French coming out of his own mouth, "Pourquoi parlez-vous Klingon?" ("Why are you speaking Klingon?") As Saru attempted to restore order, the computer reported: "Défaillance du logiciel de traduction détectée." ()

Upon hearing Lieutenant DeSalle's French name in 2267, Trelane asked him, in French, if he was really French ("Un vrai Français?"). After DeSalle answered positively, Trelane exclaimed, "Ah, monsieur! Vive la gloire! Vive Napoléon!" ("Ah, sir! Long live the glory! Long live Napoléon!") ()

In 2268, Cyrano Jones said, "Au revoir," when departing a meeting on Deep Space Station K-7. James Kirk later used the phrase on his own departure. ()

French was also spoken on 892-IV. One Roman-influenced building on the planet's surface had the words "Honneur et Patrie" ("Honor and Fatherland") inscribed on the facade. ()

James Kirk used an Earth expression, "C'est la vie," while speaking with Kruge to describe the unfortunate destruction of the  and Kruge's boarding party. ()

By the 24th century, French was considered by some to be an archaic language but was still spoken to some extent. () As a native of France, Jean-Luc Picard was fluent in the language, including folk songs and curses. ()

In 2364, the holodeck character Minuet engaged Captain Picard in a conversation in French. In their brief dialogue, both Picard and Minuet remarked, "Nous sommes tous Parisiens," meaning "We are all Parisians [in spirit]." ()

The holographic gangster Cyrus Redblock from the Dixon Hill series of holoprograms said, "Au revoir et bonne chance, mon ami ("Goodbye and good luck, my friend") before he left the holodeck and dissolved in a corridor of the . ()

Captain Picard said goodbye to Natasha Yar in French following her funeral ceremony on the holodeck. ()

After time traveling from 2368 to 1893 San Francisco, Data identified himself as a Frenchman, and spoke French with a native speaker of the language, Frederick La Rouque. ()

Quark used the French term "objet d'art" when Odo suggested that Morn may have spent his money on works of art. ()

Odo learned French in late 2374, from Vic Fontaine. The Changeling believed it to be "the language of love". ()

The Gigolo in the holographic program Paris 3 (Chez Sandríne) spoke French, using terms such as "ma cherie" and "reculez-vous". ()

When the  travelled back in time to 2024 and landed near Château Picard, the Borg Queen was able to infiltrate the French cellular phone network. After speaking to an operator in English, she spoke to a French National Police dispatcher in French, summoning a police officer to the château by claiming that a woman was in distress. When Leclerc boarded La Sirena, she spoke to him in English, which he was also able to speak. ()

French literature and music
 Auprès de ma Blonde ()
 Cyrano de Bergerac ()
 "Sur le pont d'Avignon" ()
 "Frère Jacques"
 "Non, je ne regrette rien"
 Les Misérables

French language establishments 
 Café des Artistes ()
 Café Moulin ()
 Le Coeur de Lion ()

Usages of the French language

Background information
A few episode titles derive from French expressions:
  (from déjà vu, "already seen")
  (from ménage à trois, "threesome," literally "household of three")
  ("face to face")

(The title "Deja Q" omitted the accents on the word déjà, even though "Ménage à Troi," from the same season, employed the very same accents.)

The title of  derives from the title of the crown prince of France. Since the royal character in the episode is a woman, the French translation of the episode changed the title to the feminine form, La dauphine.

The final line of , "The more things change, the more they stay the same," is a translation of the French aphorism by , "Plus ça change, plus c'est la même chose."

External links 
 
 

de:Französisch
Earth languages