Which to use
“C1” and “co” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #12,528
- “C1” frequency rank
- #1,856
- “co” frequency rank
- 14384
- confusion score
Side-by-Side Comparison
| Feature | C1 | co |
|---|---|---|
| Definition | Niveau de langue correspondant à un niveau expérimenté (autonome) : personne capable de comprendre des textes longs et exigeants et saisir des significations implicites ; s’exprimer spontanément et couramment sans trop devoir chercher ses mots ; utiliser la langue de façon efficace et souple dans la vie sociale, professionnelle ou académique ; s’exprimer sur des sujets complexes de façon claire et bien structurée et manifester son contrôle des outils linguistiques d'organisation, d’articulation et de cohésion du discours. | Connexion. |
Where the eye mixes C1 and co
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: C1 vs co
A purely visual mix-up. C1 (\se.œ̃\) and co (\ko\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by a single letter - 1 in “C1” becomes o in “co”. Our composite confusion score for this pair is 14384, derived from the frequency rank of both members and their visual similarity.
C1 is recorded at frequency rank #12,528, classified as anoun, pronounced \se.œ̃\. co is at rank #1,856, tagged as anoun, pronounced \ko\.
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 14384, this pair ranks #396,907 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of C1 vs co
Shared letters: c. Private to "C1": -. Private to "co": o.
"C1" · 1 letters · shape C · "co" · 2 letters · shape CV
Frequently Asked Questions
Is swapping "C1" for "co" ever safe?
In ordinary French text, does "C1" or "co" show up more?
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 "C1" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "co" - compare definitions side by side with the headword page. Word entry
- This pair ranks #396,907 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "C1" and "co" also get mixed up with nearby pairs, the highest-scored neighbour is "C1 vs CCE". Nearby pair
Confusion rank #396,907 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.