AI translation compared with a human translator

When a machine translation is good enough for a business document, and when a trained human translator needs to do the work.

Reviewed on October 31, 2026

Use a machine for understanding and quick drafts. Use a person when the words will be relied on. That's the short version, and the rest of this page fills in the gap between those two.

¹ No system gives perfect automatic translation of any text, but many fully automated ones "produce reasonable output". The method suits "flawed but useful low-cost or ad-hoc translations". Flawed but useful is the right frame.

Start with what could go wrong if the translation is off.

The two options side by side

	Machine translation	Qualified human translator
What a source says	¹ "Flawed but useful" drafts	² Human translation "remains the most reliable, most accurate form of translation available"
After the first pass	¹ Output from neural tools usually still needs a person to edit it	A second reader can still check the result
Suits	Understanding a message, rough drafts	Documents people will rely on

Prices and turnaround vary by service. Ask any service you're considering for its current price and timing in writing.

When a machine draft is good enough

A machine draft often works for these jobs:

Reading a message from a supplier so you know what it says.
A first rough version of an internal note.
A short, plain notice where one wrong word would do little harm.

Even then,¹ output from neural tools usually needs a human to fix it afterward. That's called post-editing. Here's how to review one when you don't speak the language.

When a person needs to do it

Pick a human translator when a mistake could cost money, harm someone or start a dispute. That covers:

Contracts and legal notices.¹ For law, researchers want a human translator to review machine output. Some courts even prohibit its use in formal proceedings.
Papers an authority asks to be certified.

What "certified" means

Rules differ by country.² Local regulations say who may do a sworn or certified translation. They "vary widely from country to country." The aim is legal equivalence between the two documents.

In Australia,³ "NAATI is the national standards and certifying authority for translators and interpreters." In other countries a different body sets the rules. Ask the office that wants the paper what it accepts. That office, not a translation tool's marketing, decides.

Finding a qualified translator

Don't take a service's word for it.³ In Australia, NAATI keeps an online directory to find certified translators and interpreters. Holding its certification means meeting "the standard expected of translators and interpreters in the community." Elsewhere, find the professional body or government office that sets the rules. Ask it how to verify a name.

Ask the translator, in writing, which document types they handle and how long the job will take. Ask what they do with your files after the job. Keep the answers with the project record.

A middle path

Many small businesses use both. A machine produces the draft. A bilingual staff member or a qualified translator reads it. The checker must read the original too, not only the result. See back-translation for a quick extra test you can run yourself.