lutovsluxWhich spelling fits?

Which to use

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

#11,444
“luto” frequency rank
#23,482
“lux” frequency rank
34926
confusion score

Side-by-Side Comparison

Feature luto lux
Definition Expresión de pena por la muerte de una persona, se manifiesta en la ropa y accesorios de color negro, así como en adornos que se colocan en el lugar donde vivía o donde se vela el difunto. Unidad derivada del Sistema Internacional de Unidades para la iluminancia o nivel de iluminación, equivalente a un lumen por metro cuadrado.

Where the eye mixes luto and lux

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
luto
3 ch
lux

Why the eye confuses luto with lux

A purely visual mix-up. luto ([ˈlut̪o]) and lux ([ˈluks]) 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 34926, derived from the frequency rank of both members and their visual similarity.

luto is recorded at frequency rank #11,444, classified as anoun, pronounced [ˈlut̪o]. lux is at rank #23,482, tagged as anoun, pronounced [ˈluks].

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 34926, this pair ranks #188,812 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of luto vs lux

Shared letters: lu. Private to "luto": ot. Private to "lux": x.

"luto" · 4 letters · shape CVCV  ·  "lux" · 3 letters · shape CVC

Known mistypes of this pair

  • lutolluto · ltuo · luot · lutto · ulto

Frequently Asked Questions

Do "luto" and "lux" mean the same thing in a sentence?
No. They are said differently ([ˈlut̪o] versus [ˈluks]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "luto" or "lux"?
"luto" is the more common of the two: it sits at frequency rank #11,444 in our Spanish list, against #23,482 for "lux". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

  • Full dictionary entry for "luto" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "lux" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #188,812 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "luto" and "lux" also get mixed up with nearby pairs, the highest-scored neighbour is "lac vs lux". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #188,812 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