FDJ vs foi, What's the Difference?

Which to use

“FDJ” is a name and “foi” is a noun - they look or sound alike but fill different roles in a sentence.

#26,367
“FDJ” frequency rank: #1,478
“foi” frequency rank: 27845
confusion score

Side-by-Side Comparison

Feature	FDJ	foi
Definition	Société française qui commercialise des jeux de hasard et est en partie contrôlée par l’État français.	Croyance aux dogmes de la religion, en Dieu.

Where the eye mixes FDJ and foi

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

3 ch

FDJ

3 ch

foi

Visual trap between FDJ and foi

These two trip readers on the page rather than in the ear: FDJ is \ɛf.de.ʒi\ while foi is \fwa\. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (name vs noun), which is usually the fastest check. Our composite confusion score for this pair is 27845, derived from the frequency rank of both members and their visual similarity.

FDJ is recorded at frequency rank #26,367, classified as aname, pronounced \ɛf.de.ʒi\. foi is at rank #1,478, tagged as anoun, pronounced \fwa\.

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 27845, this pair ranks #326,434 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of FDJ vs foi

Shared letters: f. Private to "FDJ": dj. Private to "foi": io.

"FDJ" · 3 letters · shape CCC · "foi" · 3 letters · shape CVV

Frequently Asked Questions

Do "FDJ" and "foi" mean the same thing in a sentence?

No - they are not even the same part of speech. "FDJ" is a name and "foi" a noun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "FDJ" or "foi"?

"foi" is the more common of the two: it sits at frequency rank #1,478 in our French list, against #26,367 for "FDJ". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Eye-level mix-up between "FDJ" and "foi" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "FDJ" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "foi" - compare definitions side by side with the headword page. Word entry
This pair ranks #326,434 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"FDJ" and "foi" also get mixed up with nearby pairs, the highest-scored neighbour is "FDJ vs Fee". Nearby pair

Confusion rank #326,434 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.