icivsioWhat's the difference?

Quick tell: ici is a adverb, io is a noun, so they fill different roles in a sentence.

Which to use

“ici” is an adverb and “io” is a noun - they look or sound alike but fill different roles in a sentence.

#153
“ici” frequency rank
#23,588
“io” frequency rank
23741
confusion score

Side-by-Side Comparison

Feature ici io
Definition Il marque la proximité immédiate dans l’espace par rapport à soi. Septième lettre de l’alphabet cyrillique, ё.

Where the eye mixes ici and io

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

3 ch
ici
2 ch
io

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: ici is \i.si\ while io is \jo\. 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 (adverb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 23741, derived from the frequency rank of both members and their visual similarity.

ici is recorded at frequency rank #153, classified as anadv, pronounced \i.si\. io is at rank #23,588, tagged as anoun, pronounced \jo\.

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 23741, this pair ranks #350,730 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ici vs io

Shared letters: i. Private to "ici": c. Private to "io": o.

"ici" · 3 letters · shape VCV  ·  "io" · 2 letters · shape VV

Frequently Asked Questions

Can "ici" and "io" be used interchangeably?
No - they are not even the same part of speech. "ici" is an adverb and "io" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "ici" or "io"?
"ici" is the more common of the two: it sits at frequency rank #153 in our French list, against #23,588 for "io". 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