kayvskoWhich spelling fits?

Which to use

“kay” and “ko” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#18,591
“kay” frequency rank
#15,405
“ko” frequency rank
33996
confusion score

Side-by-Side Comparison

Feature kay ko
Definition Partícula que se añade al final de una frase para indicar que se está realizando una pregunta acerca de un tema ya aparecido antes en la conversación o sobre el que se tiene un interés particular. Este, esta. Pronombre y adjetivo demostrativo usado para una entidad presente.

Where the eye mixes kay and ko

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

3 ch
kay
2 ch
ko

Visual trap between kay and ko

A purely visual mix-up. kay ([ˈkaj]) and ko (/ˈko/) 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 1 letter(s) in length. Our composite confusion score for this pair is 33996, derived from the frequency rank of both members and their visual similarity.

kay is recorded at frequency rank #18,591, classified as apron, pronounced [ˈkaj]. ko is at rank #15,405, tagged as apron, pronounced /ˈko/.

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 33996, this pair ranks #193,763 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of kay vs ko

Shared letters: k. Private to "kay": ay. Private to "ko": o.

"kay" · 3 letters · shape CVV  ·  "ko" · 2 letters · shape CV

Frequently Asked Questions

Can "kay" and "ko" be used interchangeably?
No. They are said differently ([ˈkaj] versus /ˈko/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary Spanish text, does "kay" or "ko" show up more?
"ko" is the more common of the two: it sits at frequency rank #15,405 in our Spanish list, against #18,591 for "kay". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

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

  • Full dictionary entry for "kay" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ko" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #193,763 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "kay" and "ko" also get mixed up with nearby pairs, the highest-scored neighbour is "Kano vs kay". Nearby pair

Confusion rank #193,763 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list