Aix vs au, What's the Difference?

Which to use

“Aix” is a name and “au” is an article - they look or sound alike but fill different roles in a sentence.

#5,210
“Aix” frequency rank: #24
“au” frequency rank: 5234
confusion score

Side-by-Side Comparison

Feature	Aix	au
Definition	Nom court de Aix-en-Provence.	Contraction de la préposition à et de l'article défini le.

Where the eye mixes Aix and au

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

3 ch

Aix

2 ch

Why the eye confuses Aix with au

These two trip readers on the page rather than in the ear: Aix is \ɛks\ while au is \o\. 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 (name vs article), which is usually the fastest check. Our composite confusion score for this pair is 5234, derived from the frequency rank of both members and their visual similarity.

Aix is recorded at frequency rank #5,210, classified as aname, pronounced \ɛks\. au is at rank #24, tagged as anarticle, pronounced \o\.

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 5234, this pair ranks #429,575 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of Aix vs au

Shared letters: a. Private to "Aix": ix. Private to "au": u.

"Aix" · 3 letters · shape VVC · "au" · 2 letters · shape VV

Frequently Asked Questions

Do "Aix" and "au" mean the same thing in a sentence?

No - they are not even the same part of speech. "Aix" is a name and "au" an article, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "Aix" or "au"?

"au" is the more common of the two: it sits at frequency rank #24 in our French list, against #5,210 for "Aix". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

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

Full dictionary entry for "Aix" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "au" - compare definitions side by side with the headword page. Word entry
This pair ranks #429,575 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"Aix" and "au" also get mixed up with nearby pairs, the highest-scored neighbour is "Aix vs aur". Nearby pair

Confusion rank #429,575 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.