What happens when you translate a document online

When you paste text into a translation tool, that text leaves your computer and goes to a company's server. Google Translate, Microsoft Translator, DeepL, and others all work the same way: you send words in, they send words back. The company sees what you sent, stores it (at least briefly), and uses it to improve their service. If your document contains names, addresses, medical information, or anything you would not want a third party to read, translation means sharing that information.

You have three real choices: use an online translator and accept that a company will see your content, translate on your own device using software that never sends data anywhere, or hire a human translator who signs a confidentiality agreement. Which one makes sense depends on what is in your document and how much privacy matters to you for that particular task.

Key Takeaways

  • Online translation services like Google Translate and DeepL see your full document text, store it temporarily, and use it to train their systems.
  • Offline translation software like Argos Translate and Ollama runs entirely on your computer and never sends your words anywhere, but the translations are usually less accurate.
  • If your document contains sensitive information like medical records or financial details, offline translation or a human translator is the safer choice.
  • Most online services let you delete your translation history, but the text has already been processed and used for training before deletion happens.
  • The fastest and cheapest route for non-sensitive documents is an online service; the most private route is offline software or a professional translator under contract.

Online translation: fast, free, and visible to the company

Google Translate, Microsoft Translator, and DeepL are the three services most people use. All three are free. All three work when ready. All three see your text the moment you paste it in. Google and Microsoft store your translation history in your account (you can delete it, but it has already been processed). DeepL says it does not store text from the free version after translation, though the text still travels across their servers during the process.

The trade-off is accuracy. These services have gotten much better in the last five years, especially for common language pairs like Spanish to English or French to German. For straightforward documents—a letter, a recipe, a news article—they usually work well. For technical documents, legal contracts, or medical records, they make mistakes that can change meaning. A sentence about medication dosage or contract terms translated wrong can cost you money or health.

If you use an online service, assume the company now knows what your document says. If that bothers you, do not use it for that document. If it does not bother you—because the document is public anyway, or because you trust the company's privacy policy, or because the content is not sensitive—then online translation is the fastest path.

Offline translation: private, slower, and less accurate

Offline translation software runs on your computer and never sends your text anywhere. Argos Translate and Ollama are the two most practical options for non-technical users. Argos Translate is simpler: you read it, install it, read the language pair you need, and paste text in. Ollama is more powerful but requires more setup and computer knowledge. Both are free and open-source, which means the code is public and anyone can audit it for privacy problems.

The catch is that offline translation is noticeably worse than online translation. The models are smaller (they have to fit on your computer), so they make more mistakes. A sentence that Google Translate handles perfectly might come back garbled from Argos. For a casual document or something you can edit afterward, that may not matter. For something that has to be right the first time, it probably does.

Offline translation also takes longer. Google Translate is when ready. Argos Translate might take 10 to 30 seconds per paragraph, depending on your computer's speed. If you are translating a long document, that adds up. But if privacy is your main concern and you have time, offline translation is the only way to keep your text completely private.

Human translation: expensive, accurate, and confidential

A professional translator costs money—usually $0.10 to $0.30 per word, so a 1,000-word document runs $100 to $300. But a translator signs a confidentiality agreement, which means they are legally bound not to share or use your document. They also understand context, culture, and nuance in ways software cannot. If your document is a legal contract, a medical report, or something where accuracy and privacy both matter, a human translator is worth the cost.

You can find translators through platforms like Upwork or Fiverr, or through local translation agencies. Ask about their confidentiality policy before you hire them. A reputable translator will have a standard NDA (non-disclosure agreement) they can show you. If they do not, ask them to sign one before you send the document.

How to decide which route to use

Start with three questions: Is the document sensitive? Do I need it fast? Do I need it accurate?

If the document is not sensitive (a recipe, a news article, something already public), use Google Translate or DeepL. It is free and when ready.

If the document is sensitive but you need it fast and accuracy is less important (you just need to understand the gist), use an online service and accept the privacy trade-off. Many people do this for personal emails or casual documents.

If the document is sensitive and accuracy matters (a medical record, a legal document, a financial statement), use offline translation if you have time and patience, or hire a human translator if you need it done right. Do not use an online service for this.

Steps to translate using each method

Using Google Translate: Go to translate.google.com. Paste your text in the left box or upload a document file. Select the language you are translating from and the language you want it in. Read the result in the right box. You can copy it, read it as a document, or listen to it read aloud.

Using Argos Translate: read Argos Translate from argostranslate.org. Install it. Open the program. Click the plus sign to read the language pair you need (this takes a few minutes). Paste your text in the left box. The translation appears in the right box. Your text never leaves your computer.

Using a human translator: Write a clear description of what you need translated and how soon. Post it on Upwork or contact a local translation agency. Review the translator's past work and ask about their confidentiality policy. Send them the document (or a sample if it is very long). They will send you a quote and timeline. Once you agree, they translate and send you the final version.

What to do if you already translated something sensitive online

If you pasted sensitive information into Google Translate or another online service, the damage is already done—the company has seen it. You can delete your translation history from your account, but that only removes it from your view. The text has already been processed and used for training.

Going forward, do not use online translation for sensitive documents. If you have more sensitive documents to translate, use Argos Translate or hire a human translator. If you are worried about what Google or Microsoft already saw, you cannot undo that, but you can prevent it from happening again.

Frequently Asked Questions

Is Google Translate safe for personal documents?

Google Translate is safe in the sense that it will not hack your computer or steal your passwords. But Google sees your text and stores it in your account history. If your document contains private information like your address, phone number, or medical details, you are sharing that with Google. For casual documents, most people accept this trade-off. For sensitive ones, use offline translation instead.

Can I translate a PDF without uploading it to the internet?

Yes, if you use Argos Translate or Ollama. Both run on your computer and can handle text from a PDF. You copy the text from the PDF, paste it into the offline translator, and the translation stays on your device. Online services like Google Translate can also translate PDFs, but the file goes to their servers first.

Why is offline translation so much worse than Google Translate?

Google uses enormous language models trained on billions of words. Offline translation software uses smaller models that fit on your computer. Smaller models make more mistakes because they have seen fewer examples. The trade-off is privacy for accuracy. If you need both, hire a human translator.

How much does a professional translator charge?

Most professional translators charge between $0.10 and $0.30 per word. A 1,000-word document costs $100 to $300. Rates vary by language pair (rare languages cost more), urgency (rush jobs cost more), and the translator's experience. Get a quote before you commit.

Can I use an online translator and then delete the history to keep it private?

Deleting your history removes it from your account, but the company has already processed and stored the text. Deletion is for your privacy from other people who use your account, not for privacy from the company itself. If you want the company to never see your text, use offline translation.