Helping AI give clearer, more accurate answers in Spanish.
Response evaluation, error correction, response writing, data labeling and English-to-Spanish translation for AI projects.
I have built and tested my own AI agents, so I know how models fail: wrong numbers, invented facts, unnatural Spanish and answers that ignore the instructions. I review carefully, follow guidelines and explain my decisions in writing.
Skills
What I can do on an AI training project.
Response evaluation
Compare and rate AI answers with a rubric: accuracy, helpfulness, clarity, tone and safety.
Ideal responses
Write clear, correct answers in natural Spanish that follow every instruction in the prompt.
Error detection
Spot wrong calculations, invented facts, missing steps and instructions the model ignored.
Spanish quality
Fix grammar, anglicisms and unnatural phrasing. Adapt the tone: formal, friendly, tú or usted.
Data labeling
Classify messages by intent, sentiment and urgency, including informal Colombian Spanish.
Translation review
Translate English into natural Latin American Spanish and fix literal, word-for-word translations.
Where these skills come from
Real experience, not just a course.
I build AI agents in n8n with OpenAI. Testing them meant reading many outputs, finding where they were wrong and rewriting prompts until the answers were reliable.
In my payment-receipt automation I defined strict rules: a wrong confirmation is worse than none, so unclear cases always go to a person.
For about ten years I answered customer messages by WhatsApp and phone in a family restaurant. I know how people really write: short, informal, with local expressions.
As a restaurant administrator I handled invoices, payroll and payments, where small mistakes matter.
My education includes civil engineering and business administration.
Sample tasks
How I approach the work.
I created these five samples to show how I work. The prompts, answers and customer messages are fictional.
Response comparison and rating
Two AI answers to the same Spanish prompt. I rate each one with a rubric, choose the better answer and explain why.
User prompt
"Explícame de forma sencilla qué es el flujo de caja y por qué es importante para un negocio pequeño."
El flujo de caja es el dinero que entra y sale de tu negocio en un período, por ejemplo, en un mes.
- Entradas: ventas cobradas, pagos de clientes.
- Salidas: proveedores, arriendo, nómina, servicios.
Es importante porque un negocio puede tener ganancias y aun así quedarse sin efectivo. Por ejemplo, si vendes a crédito y tus clientes te pagan en 60 días, pero tus proveedores te cobran en 30, puedes tener problemas para pagar a tiempo.
Llevar el control del flujo de caja te ayuda a anticipar esos momentos y tomar decisiones antes de que sea tarde.
El flujo de caja es la ganancia que obtiene el negocio después de pagar todos los gastos. Es muy importante porque en orden de crecer, el negocio necesita tener mucho flujo de caja. Si el flujo de caja es alto, el negocio está bien. Si es bajo, el negocio está mal. Para mejorarlo puedes aplicar para un préstamo en el banco y así tendrás más flujo de caja siempre.
red = factual error · yellow = unnatural Spanish or poor advice
| Rubric | Response A | Response B |
|---|---|---|
| Accuracy | 5/5 | 2/5 |
| Helpfulness | 5/5 | 2/5 |
| Clarity | 5/5 | 3/5 |
| Natural Spanish | 5/5 | 2/5 |
| Safety / advice quality | 5/5 | 2/5 |
My justification
A is much better. It defines cash flow correctly (money coming in and going out) and gives a realistic example of why a profitable business can still run out of cash.
B confuses cash flow with profit, which is the key concept the user asked about. It also uses anglicisms ("en orden de" from in order to, "aplicar para" from apply for) and suggests a loan as a general fix, which is poor financial advice.
Finding and fixing errors in an AI answer
An AI answer that sounds confident but is wrong. I mark each problem, explain it, and rewrite the answer so it is correct and easy to follow.
User prompt
"Vendí un producto en $119.000 con IVA incluido del 19 %. ¿Cuánto es el IVA y cuál es el valor sin IVA?"
El IVA es el 19 % de $119.000, es decir, $22.610. Por lo tanto, el valor sin IVA es $96.390. Usted debería de declarar este valor en su próxima factura.
Issues found
- Wrong methodThe model applied 19 % to a price that already includes VAT. The correct base is $119.000 ÷ 1,19 = $100.000, so VAT is $19.000, not $22.610.
- Wrong resultBecause of the first error, the value without VAT ($96.390) is also wrong. The answer never checks its result.
- Grammar"Debería de" expresses probability. For a recommendation, standard Spanish uses "debería".
- Unsupported adviceVAT is not declared "on the next invoice". The claim is vague and misleading, so I removed it and suggested asking an accountant.
Como el precio ya incluye el IVA, primero hay que sacar el valor sin IVA:
1. Valor sin IVA = $119.000 ÷ 1,19 = $100.000
2. IVA = $119.000 − $100.000 = $19.000
Comprobación: el 19 % de $100.000 es $19.000, y $100.000 + $19.000 = $119.000.
Si tienes dudas sobre cómo declarar el IVA, lo mejor es consultarlo con tu contador.
What I changed
- Correct method for a price that includes VAT
- Steps shown so the user can follow
- A quick check of the result
- Removed the misleading tax claim
- Friendly "tú" tone, matching the user's question
Writing an ideal response with constraints
Many AI training tasks ask for the best possible answer to a prompt with specific rules. I write the response and then check every instruction one by one.
User prompt
"Escribe un mensaje de WhatsApp para recordarle a una clienta, Laura, que tiene una factura vencida. Factura N.º 1045 por $350.000, venció el 5 de noviembre. Tono amable, máximo 50 palabras y que no suene amenazante."
My response
Alternative I would offer
If the project guidelines prefer a formal tone, I would switch to "usted": "Hola, Laura. Le escribimos de Tienda Sol para recordarle…". In Colombia many businesses use "usted" with customers, so I would follow the guideline or the brand's usual style.
| Friendly tone | Greets by name, says "recordarte" instead of demanding, ends with thanks |
| 50 words maximum | 43 words |
| Includes the invoice data | Number, amount and due date, exactly as given |
| Not threatening | No penalties or pressure; offers a solution if she needs more time |
| Clear next step | Send the receipt if she already paid |
| Fits WhatsApp | Short sentences, no subject line or email-style signature |
Labeling real-style Spanish customer messages
AI models learn from labeled examples. I classify customer messages written the way people really write on WhatsApp, and explain local expressions that a non-native labeler could misread.
| Message | Intent | Sentiment | Urgency | Labeler note |
|---|---|---|---|---|
| "Buenas, ¿me regala un domicilio de dos almuerzos ejecutivos pa' la calle 45?" | Order request | Neutral | Medium | "Me regala" is a polite way to ask for something in Colombia. It does not mean "for free". "Pa'" = para. |
| "Llevo una hora esperando el pedido y nada, qué falta de seriedad." | Complaint · late delivery | Negative | High | Clear frustration. Should go to a person quickly. |
| "¿Hasta qué hora atienden hoy?" | Information · opening hours | Neutral | Low | Simple question; can be answered automatically. |
| "Parce, ¿el plato del día todavía trae sopa?" | Product question | Neutral | Low | "Parce" is informal Colombian slang for friend. Not rude. |
| "Ya les consigné, ahí les mando el pantallazo." | Payment confirmation | Neutral | Medium | "Consigné" = I made a bank deposit or transfer. "Pantallazo" = screenshot. |
| "Qué rico estuvo todo, muchas gracias, ¡los recomiendo!" | Compliment | Positive | Low | Positive feedback; no action needed beyond a thank-you. |
| "Necesito cancelar el pedido que hice hace cinco minutos, me equivoqué de dirección." | Order change · cancellation | Neutral | High | Time-sensitive: the order may already be in preparation. |
Why local knowledge matters
A model trained only on formal or Spain Spanish could label "¿me regala un domicilio?" as a request for free food, or read "parce" as disrespect. Correct labels need someone who knows how Latin American customers actually write.
How I keep labels consistent
- Read the guideline and examples before starting
- Use the same rule for similar cases
- Write a short note when a case is ambiguous
- Ask or flag instead of guessing
Fixing a literal translation
A customer support message translated word for word sounds strange to a Spanish speaker. I compare a literal machine-style translation with my version and explain each change.
Source text (English)
"Thanks for reaching out! We're sorry your order arrived late. We've issued a refund for the shipping fee, which should show up in your account within 3–5 business days. If you have any other questions, feel free to reply to this email."
¡Gracias por alcanzarnos! Estamos apenados que su orden llegó tarde. Hemos emitido un reembolso por la tarifa de envío, el cual debería aparecer en su cuenta dentro de 3–5 días de negocio. Si tiene cualquier otra pregunta, siéntase libre de responder a este email.
¡Gracias por escribirnos! Lamentamos que tu pedido haya llegado tarde. Ya te devolvimos el valor del envío; el dinero debería verse reflejado en tu cuenta en un plazo de 3 a 5 días hábiles. Si tienes alguna otra pregunta, puedes responder a este correo.
| Literal | My choice | Why |
|---|---|---|
| alcanzarnos | escribirnos | "Reach out" means to contact. "Alcanzar" means to reach physically, so the literal version is wrong. |
| Estamos apenados | Lamentamos | In Colombia and other countries "apenado" usually means embarrassed. "Lamentamos" is the neutral way to apologize. |
| llegó | haya llegado | After "lamentar que", Spanish uses the subjunctive. |
| orden | pedido | "Pedido" is the common word for a customer's order in most of Latin America. |
| días de negocio | días hábiles | Word-for-word copy of "business days". The correct term is "días hábiles". |
| siéntase libre de | puedes | Copy of "feel free to". "Puedes" sounds natural and keeps the friendly tone. |
| su / tiene | tu / tienes | I matched the friendly English tone with "tú". If the brand uses "usted", I would change it consistently in every sentence. |
How I work
Careful, consistent and easy to review.
- Step 1
Read the guidelines first
I study the instructions, rubric and examples before the first task, and go back to them when a case is unclear.
- Step 2
Check every claim
I verify facts, numbers and instructions instead of trusting how confident an answer sounds.
- Step 3
Explain my decisions
I write short, specific justifications that a reviewer can check quickly.
- Step 4
Learn from feedback
I use reviewer feedback to adjust my work and stay consistent across tasks.
Tasks I am ready for
- Spanish response evaluation and ranking
- Writing prompts and ideal responses
- Fact-checking and error correction
- Spanish grammar and style review
- Text labeling: intent, sentiment, topic
- English-to-Spanish translation and review
Tools
Tools I use in real work and projects.
Let's work together
Need a careful Spanish-speaking AI trainer?
I can start with a test task so you can review the quality of my work before a longer project. Send me a message through the platform where you found my application.
Spanish (native, Colombia). English intermediate conversational, comfortable in writing.
Asynchronous, written communication. Based in Colombia (GMT-5).
Full-time or part-time remote, flexible hours.