lavsloWhat's the difference?

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

Which to use

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

#2
“la” frequency rank
#8,119
“lo” frequency rank
8121
confusion score

Side-by-Side Comparison

Feature la lo
Definition Féminin singulier de le. Détermine un groupe nominal féminin singulier. Année.

Where the eye mixes la and lo

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

2 ch
la
2 ch
lo

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: la is \la\ while lo is \lo\. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - a in “la” becomes o in “lo”, and the parts of speech differ too (article vs noun), which is usually the fastest check. Our composite confusion score for this pair is 8121, derived from the frequency rank of both members and their visual similarity.

la is recorded at frequency rank #2, classified as anarticle, pronounced \la\. lo is at rank #8,119, tagged as anoun, pronounced \lo\.

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 8121, this pair ranks #421,047 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of la vs lo

Shared letters: l. Private to "la": a. Private to "lo": o.

"la" · 2 letters · shape CV  ·  "lo" · 2 letters · shape CV

Frequently Asked Questions

Can "la" and "lo" be used interchangeably?
No - they are not even the same part of speech. "la" is an article and "lo" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "la" or "lo"?
"la" is the more common of the two: it sits at frequency rank #2 in our French list, against #8,119 for "lo". 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