lavsluiWhat's the difference?

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

Which to use

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

#2
“la” frequency rank
#68
“lui” frequency rank
70
confusion score

Side-by-Side Comparison

Feature la lui
Definition Féminin singulier de le. Détermine un groupe nominal féminin singulier. Pronom clitique de la troisième personne du singulier épicène du complément d’objet indirect.

Where the eye mixes la and lui

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

2 ch
la
3 ch
lui

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: la is \la\ while lui is \lɥi\. 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 (article vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 70, derived from the frequency rank of both members and their visual similarity.

la is recorded at frequency rank #2, classified as anarticle, pronounced \la\. lui is at rank #68, tagged as apron, pronounced \lɥi\.

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 70, this pair ranks #440,139 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of la vs lui

Shared letters: l. Private to "la": a. Private to "lui": iu.

"la" · 2 letters · shape CV  ·  "lui" · 3 letters · shape CVV

Frequently Asked Questions

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

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

Source: FrequencyWords open word-frequency list