luivsluneTell them apart

Quick tell: lui is a pronoun, lune is a noun, so they fill different roles in a sentence.

Which to use

“lui” is a pronoun and “lune” is a noun - they look or sound alike but fill different roles in a sentence.

#68
“lui” frequency rank
#2,045
“lune” frequency rank
2113
confusion score

Side-by-Side Comparison

Feature lui lune
Definition Pronom clitique de la troisième personne du singulier épicène du complément d’objet indirect. Satellite naturel de la Terre, qui tourne autour de celle-ci en un cycle de vingt-sept jours sept heures quarante-trois minutes. Le satellite réfléchit sur la Terre la lumière qu’il reçoit du Soleil. Lune s’écrit avec une majuscule en astronomie lorsqu'on s'en sert comme nom propre de cet astre, pour le distinguer des autres satellites naturels.

Where the eye mixes lui and lune

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch
lui
4 ch
lune

Visual trap between lui and lune

These two trip readers on the page rather than in the ear: lui is \lɥi\ while lune is \lyn\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (pronoun vs noun), which is usually the fastest check. Our composite confusion score for this pair is 2113, derived from the frequency rank of both members and their visual similarity.

lui is recorded at frequency rank #68, classified as apron, pronounced \lɥi\. lune is at rank #2,045, tagged as anoun, pronounced \lyn\.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 2113, this pair ranks #436,757 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of lui vs lune

Shared letters: lu. Private to "lui": i. Private to "lune": en.

"lui" · 3 letters · shape CVV  ·  "lune" · 4 letters · shape CVCV

Known mistypes of this pair

  • lunellune · lnue · luen · lunne · ulne

Frequently Asked Questions

Can "lui" and "lune" be used interchangeably?
No - they are not even the same part of speech. "lui" is a pronoun and "lune" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "lui" or "lune"?
"lui" is the more common of the two: it sits at frequency rank #68 in our French list, against #2,045 for "lune". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "lui" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "lune" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #436,757 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "lui" and "lune" also get mixed up with nearby pairs, the highest-scored neighbour is "lune vs lure". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #436,757 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list