French flashcards should not make students guess the article. A bare card that says chien ("dog") leaves out one of the most useful facts a beginner needs: the word is masculine, so the classroom form is le chien ("the dog").
That is the French flashcard rule in one sentence: the article is part of the study item.
Rule 1: Show The Article When It Teaches Gender
French nouns are masculine or feminine. The article makes that visible. A good flashcard says le chien ("the dog") or la maison ("the house"), not just chien or maison.
French also elides before vowel sounds. The article becomes l' in words like l'ami ("the friend") and l'eau ("the water"). That is not an optional flourish. It is the form the learner needs to recognize and produce.
There is one wrinkle. Some French h-initial words resist elision. Le héros ("the hero") does not become l'héros. A serious flashcard system has to know that exceptions exist, because students hear them in class immediately.
French article flashcard
Rule 2: Use Full Gendered Forms
French has many masculine and feminine pairs. The useful flashcard is not an abstract stem plus a tiny ending. It is the real pair a student will use.
That means ami / amie ("friend"), acteur / actrice ("actor"), and beau / belle ("beautiful"). Full forms are clearer than abbreviations because French spelling changes are not always as simple as adding one letter.
Search should still find either side. A student who searches amie should reach the pair. The review card should show the relationship.
French gender-pair flashcard
Rule 3: Keep Plural-First Words Plural
French learners meet vocabulary that normally appears in the plural. Les vacances means "vacation" or "holidays," depending on context. Les lunettes means "glasses." Flattening those into singular forms produces cards that feel dictionary-shaped rather than classroom-shaped.
Ordinary plurals can still search back to the singular. If a learner types chiens, the useful study item may be le chien. But plural-first vocabulary should stay plural in the saved list and in review.
French plural vocabulary flashcard
How Ludus Applies These Rules
Ludus separates search from display. Search can accept inflected forms, gendered forms, and plurals. Display has to stay stable, because that is what the learner sees over and over.
For French, that means articles when they teach gender, full masculine and feminine forms when the pair belongs together, and plural display for words students actually learn in the plural. A good French flashcard is not just a dictionary entry. It is a tiny grammar lesson that repeats until the form feels natural.