How to Choose a Translation Partner for Technical Documentation

Technical documentation is where translation quality stops being a matter of taste. A marketing page that reads a little stiffly costs you nothing measurable. An installation manual with an ambiguous safety step costs you a support case, a warranty claim, or worse.

Ask what happens to your terminology

The first question is not about price or turnaround. It is what the vendor does with your terms. A serious partner will ask for a glossary before quoting, and if you do not have one, they will offer to build it from your existing documentation. A vendor who never mentions terminology is planning to translate each document in isolation, and you will see the result: the same component named three different ways across three manuals.

Look for subject-matter reviewers, not just linguists

A fluent translator who has never worked in your field will produce text that reads well and describes the wrong thing. For regulated or technical content, ask specifically whether a subject-matter expert reviews the output, who that person is, and what they are qualified in. The answer is usually revealing.

Test with your hardest document, not your easiest

Most buyers send a clean, short, representative file as a test. This tells you almost nothing. Send the document that gives your own team trouble — the one with the inconsistent source, the embedded screenshots, the table that runs across two pages. How a vendor handles a difficult source is the only useful signal, because that is the work you are actually buying.

Understand what happens on an update

Documentation is not translated once. It is translated, then re-translated every time the product changes. Ask how the vendor handles a source update: do you pay full rate for the whole document again, or do they price the delta against a translation memory? The difference over three years is substantial, and it is the single largest lever on total cost.

Agree the review loop before you start

Decide who on your side signs off, how long they have, and what happens when they disagree with a choice. Projects rarely fail on translation quality. They fail because nobody decided who the final authority on terminology is, and two reviewers spent six weeks disagreeing politely.