AI detector by language

Last updated Oct 18, 2026

Check Spanish writing for signs of AI

Yes. Winston AI detects AI writing in Spanish and shows which sentences look machine-written, whether the text comes from Seville, Bogotá or Buenos Aires. Regional words and the formal usted are ordinary Spanish, not warning signs. Treat a high score as evidence to talk through with the writer, alongside their drafts, rather than as proof.

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Español

Detected automatically

What AI-written Spanish looks like

Viajar no solo nos permite descubrir nuevas culturas, sino que también amplía nuestros horizontes y nos regala recuerdos inolvidables que perduran toda la vida.

“Traveling not only lets us discover new cultures, it also broadens our horizons and gives us unforgettable memories that last a lifetime.”

Illustrative example. Paste Spanish text as it is: no need to translate it first.

Key facts

Winston AI detects Spanish automatically, so text from Spain and Latin America can be pasted without choosing a region.
Regional forms such as vosotros, vos and computadora are ordinary Spanish and are not signs of AI writing.
Winston AI gives an overall AI score plus sentence-level highlights: red for likely AI, yellow for mixed signals.
Source: AI Detector
New accounts get 2,000 free credits with no card required; one credit covers about one word.
Source: Pricing

Reading Spanish results

Widely written in

Spain
Mexico
Colombia
Argentina
United States

Spain or Latin America, same scan
Vosotros or ustedes, ordenador or computadora, tú or vos: these are regional choices, not signs of AI. Paste the text as written and judge the highlighted sentences on what they say.
Usted is not a red flag
Formal Spanish is standard in business letters, university work and anything addressed to a stranger. A consistently formal register is expected there, so don't read formality itself as evidence.
Translated drafts read smooth
A text written in English and run through a translation tool can come back even and polished, and some of it may show as yellow. Ask how the text was produced before drawing conclusions.

Paste Spanish text from wherever it was written (Spain, Mexico, Argentina, Colombia) and Winston AI gives you an overall score plus sentence-level highlights. This page covers how regional writing differs, why formal Spanish isn't a warning sign, and how to read a result before you act on it.

One language, many classrooms

A teacher in Seville and a professor in Bogotá both mark Spanish, but not the same Spanish. Students in Spain write vosotros and ordenador; students in Mexico write ustedes and computadora; in Argentina and Uruguay, vos turns up in anything informal. None of that is a signal in either direction. Winston AI detects Spanish automatically, so you can paste text as-is without picking a region.

What deserves attention is a voice that belongs nowhere. Default AI output in Spanish often settles into a neutral, region-free register: no local words, no idioms, no small slips. If a student who usually writes with plenty of local expressions hands in an essay that could come from any country, that's worth a closer look. It isn't proof on its own.

Long assignments on both sides of the Atlantic

Universities in Spain ask for a TFG (trabajo de fin de grado) and, at master's level, a TFM. Across Latin America the equivalent is usually a tesis or, in some countries, a tesina. These are long documents, revised over months and often shaped with a tutor, so a scan can show yellow where a supervisor or a grammar tool smoothed the prose. Read highlights alongside the drafts and the tutor's comments.

Ask for earlier drafts or the file's version history
Compare the flagged chapter with the student's emails, exams or class work
Pick one highlighted paragraph and ask the student how they wrote it

Questions about Spanish detection

Still unsure? Browse our guides or ask our team.

Does Winston AI work on Latin American Spanish as well as Spanish from Spain?

Yes. Winston AI reads both as Spanish and detects the language on its own, so there's nothing to select. Regional vocabulary like vosotros, vos or computadora is ordinary Spanish, not a sign of AI.

Is formal Spanish written with usted a sign of AI?

No. Formal Spanish is standard in business letters and academic work. Look at which sentences are highlighted and what they actually say, rather than at the overall tone.

Can I scan a whole TFG or tesis?

Yes. On the free detector you can paste chapters, and the free plan's 2,000 credits cover roughly 2,000 words. For a full thesis, a paid plan lets you upload the PDF or DOCX in one go.

What if a student wrote in English and translated the text into Spanish?

Ask the student how the text was produced before treating it as AI writing. Machine-translated text can come back smooth and even, and parts of it may show as yellow. A translation tool is not the same as AI writing, and your policy may treat the two differently.

Check Spanish text now

Paste it as it is. The detector recognizes Spanish on its own and highlights each sentence that reads as machine-written.

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