Translation is one of the few things a business buys where you cannot inspect the product yourself. If you could read the target language well enough to judge the file, you would not be outsourcing it. So the usual quality signal is unavailable, and buyers fall back on the only number they can compare: the rate. That is how companies pay twice: once for a cheap file, again for the professional who fixes it before a bank or a client sees it.
The takeaway up front: you cannot evaluate the output, so evaluate the process and the accountability instead. Every criterion below is a proxy for "will this file hold up when someone official reads it?" — and each can be checked before you spend.
Why the headline rate tells you nothing
A per-word or per-page rate prices an average document that does not exist. The same 3,000 words cost very different amounts depending on whether they are a marketing page or a loan agreement, whether the source is clean text or an uncopyable scan, whether the layout must be rebuilt, and whether you need it Friday or in two weeks.
It is the same trap as a SaaS pricing page, where the sticker number matters less than the billing mechanism behind it — the principle we apply to choosing business software transfers directly. A provider who quotes from your document has read it; one who quotes from a price list has not, and that gap resurfaces as a change request, a surcharge, or a file that is useless to you.
The criteria that actually separate providers
- The quote comes from your file, not a rate card. They should assess the real document and confirm cost, scope and completion time before work starts. A quote that changes once they open the file was never a quote.
- There is a named owner for the job. One person who knows your file, your deadline and your terminology decisions. "Support@" is not an owner, and an untraceable marketplace seller has none by design.
- Review is a separate pass by a different person. The biggest single quality differentiator. Translation and proofreading by the same person twice is one pass with extra steps — nobody catches their own dropped clause or transposed figure. A real second pass checks completeness, meaning, terminology, proper nouns, numbers, consistency and formatting against your instructions. In financial, technical and legal files, most damage comes from a misplaced decimal, not clumsy prose.
- Terminology is controlled across the whole set. If a company name or a legal term renders three ways across five documents, the reviewer downstream assumes the set is unreliable. This matters most when files go out as a package, or into several languages at once.
- Someone is legally accountable. A registered company that signs a contract and issues proper invoices can be held to the deliverable, and the invoice is a deductible expense. A marketplace account can close overnight, and the recourse is a refund of a fee that was never the real cost.
- Confidentiality is a practice, not a promise. Ask who can open your files, which cloud tools they may touch, and how long data is kept after delivery. "We take privacy seriously" answers none of that.
- Post-delivery support is defined. Two weeks later you will query a term or need another format. Find out now whether that sits inside the original scope.
The buyer's checklist
Ask every candidate the same seven questions and put the answers side by side:
- Will you quote from this specific document, and what changes the price?
- Who owns my job, and how do I reach that person mid-project?
- Is proofreading done by someone other than the translator?
- How do you keep terminology consistent across these files, and across languages?
- Are you a registered company? Will you sign a contract and issue an invoice?
- Who can access my files internally, and what happens to them after delivery?
- If I query a term after handover, is that included?
Specific answers win on the sheet. Vagueness on question 3 or 5 is disqualifying for anything with legal consequences.
A worked example
Here is how one established provider answers that list. BKMOS is a Vietnamese translation and localization company operating since 2009 — more than 15 years — with three offices (two in Đà Nẵng, one in Hải Phòng) and nationwide online document intake. It is a useful reference point because it publishes its process rather than a price list.
That process runs eight documented steps: intake; analysis of scope, pair and specialisation; a quotation confirming price, timeline and delivery format; assignment of a project manager plus translators and proofreaders chosen by expertise; translation with explicit control over terminology, proper names and figures; a separate proofreading pass; a technical and format review before handover; and post-delivery support within the original scope. That answers criteria one, two, three and seven structurally — the named owner and the second pass sit in the workflow, not in a sales call. It also adapts by type: domain specialists for technical content, extra verification for notarized documents, terminology held consistent across multilingual sets.
On accountability it is a registered legal entity that signs a service contract and issues invoices under Vietnamese regulation, with company details and contact points published — hotline 0931.931.616 (also on Zalo) and [email protected]. Confidentiality is stated operationally: file access limited to the personnel who need it, controlled use of cloud tools, retention governed by the agreement. It works in six language pairs, both directions with Vietnamese — English, Chinese, Japanese, Korean, French and German.
Pricing follows the mechanism argued for above: cost depends on language pair and direction, content and specialisation, and format and timeline — file type, source quality, layout rebuild, standard versus expedited delivery. You send the documents, they assess and confirm cost and completion time, and work starts on approval. That is the shape a quote should have.
FAQ
When is a professional provider overkill? Often. For the gist of an incoming email or an internal note nobody will act on legally, machine output plus a colleague who speaks the language is the right call. Pay for professional work when the document is signed, submitted, audited, published under your brand, or read by someone who can reject it. The test is not length, it is what happens if a sentence is wrong.
How do I compare quotes that are structured differently? Send every candidate the identical file set, deadline and target format, and let each quote their own way. Then compare what sits inside the price: proofreading by a second person, layout rebuild, any rush surcharge, whether post-delivery clarification is billable. A higher quote that includes a review pass is often the cheaper one.
How do I protect confidential documents? Put it in the contract, then verify the practice: who can open the files, which tools they may use, how long data is retained. Send only the pages that need translating, and prefer providers who answer concretely rather than with a policy sentence.
Bringing it together
Buying translation is a supplier evaluation, not a commodity purchase. Define what the file has to do, insist the quote comes from your document, confirm a second person reviews the work, and check that a legal entity stands behind the invoice.
When you are ready to test that on real work, send a document to BKMOS for a scoped quote — the reason to start there is that its process, pricing factors and confidentiality practices are published in advance, which is what makes a provider evaluable at all. Start with one file, measure it against the checklist, and scale only once it has earned it.
