The Decision Most Organizations Get Wrong
Most organizations choose a translation provider the way they choose any commodity supplier: lowest price, fastest response, longest list of languages. Then they wonder why quality is inconsistent, terminology drifts between projects, and every new assignment feels like starting from scratch.
Translation is not a commodity. The output of a translation project - a contract, a medical device manual, a regulatory submission, an annual report - carries your organization's name and in many cases your legal liability. The provider you choose determines not just the cost of a project, but whether the work can be trusted, reused, and built on over time.
This guide explains what actually matters when choosing a translation partner - and how to evaluate it before you commit.
Decide Whether You Need a Vendor or a Partner
The first question is not about the provider. It is about your own requirements.
Appropriate when your translation needs are occasional, varied, and low-stakes - a document here, a certificate there, no consistency requirements across projects.
Appropriate when translation is a recurring part of your operations - technical documentation, legal materials, regulatory submissions, or multilingual content produced regularly, and consistency across projects and over time has real business value.
Be honest about which situation you are in. The rest of this guide is written primarily for organizations that need a partner.
Verify ISO Certification - and Understand What It Means
The international standard for translation services. It specifies minimum qualifications for translators and revisers, requires mandatory independent revision of every translation, defines project management requirements, and governs how terminology and reference materials are handled.
The international quality management standard. Applied to a translation company, it governs client feedback processes, continuous improvement, linguist assessment, and the organizational infrastructure that sustains quality over time.
A provider certified to both standards has had its processes independently verified by an external auditor. This is meaningfully different from a provider that claims to follow quality processes without certification.
A reputable provider will answer these questions immediately and provide certificates on request.
Vague answers about "following ISO principles" or "working towards certification" are not the same thing.
Evaluate Linguist Quality - Not Language Coverage
Every translation agency claims to cover 50, 80, or 100 languages. Language coverage is not a quality indicator. What matters is not how many languages a provider lists, but how they select, qualify, and manage the translators and revisers who do the work.
A translator who is fluent in German but has no background in pharmaceutical regulation, railway engineering, or financial reporting is not qualified to translate your documents. Subject-matter competence is as important as language competence for specialist content. Ask specifically how translators are qualified and assessed for the domain your content falls into.
Under ISO 17100:2015, mandatory revision by a second qualified linguist is a requirement, not an option. Ask whether revision is applied to all projects or only to high-value ones. The answer reveals a great deal about the provider's actual quality commitment.
Professional translation practice requires translators to work into their native language - the language they know at a native speaker level - not simply their strongest second language. Confirm this is the provider's standard practice.
A provider with genuine quality management will have documented processes for assessing translators, receiving feedback on their work, and removing underperforming linguists from active assignment. "We work with experienced professionals" is not a process description.
Assess Terminology and Translation Memory Management
Terminology consistency is the single most common quality failure in translation - and the one most directly connected to your choice of provider.
If you use the same product name, regulatory term, or contractual concept in multiple documents over multiple years, every translation of that term should be identical across all documents. This does not happen by accident. It requires:
A database of previously approved translations that is applied to all subsequent projects, ensuring that approved content is reused rather than retranslated.
A managed glossary of agreed translations for key terms, product names, and domain-specific vocabulary.
Across projects and over time - not rebuilt from scratch on each assignment.
Translation memory reduces cost on repeat content and enforces consistency. A provider that does not use TM cannot offer consistency guarantees across projects.
The translation memory should belong to your relationship - not be shared across unrelated clients. Ask whether your TM is maintained separately and whether you can export it if you change providers.
Ask to see how a glossary is built, applied, and updated. A provider with a genuine terminology management process will be able to describe it clearly.
Understand How Projects Are Managed
Translation quality is a process outcome, not just a talent outcome. The same translator, working in different project management environments, will produce different quality results. How a project is set up, briefed, monitored, and delivered determines the quality of what you receive as much as who does the translation.
You should have a named project manager - not a general inbox.
Ask for a description of the briefing process. If the answer is "we send them the file," the briefing process is inadequate.
A quality provider will have a defined process for investigating and correcting quality failures. Ask what that process looks like, and what recourse you have if a delivered translation contains errors.
Evaluate Multilingual Capability Honestly
If your translation needs involve more than one or two languages, the coordination model matters as much as the individual language quality. There are two approaches:
Different agencies handle different language pairs. Each produces work independently, with no shared terminology, no coordinated delivery, and no cross-language consistency review.
The multi-vendor model is cheaper in the short term. The single-partner model is more reliable, more consistent, and significantly less expensive to manage over time.
Ask for specific examples - client name, language count, project type. A provider with genuine multilingual capability will have documented examples. A provider claiming general multilingual capability without specific evidence is telling you what you want to hear.
This is the quality check that catches inconsistencies between language versions before they reach you. Many providers do not do it. Ask specifically.
Assess Sector and Subject-Matter Experience
Translation quality in specialist domains - medical devices, pharmaceuticals, legal, financial, technical engineering - depends significantly on the translator's professional background in the relevant field, not just their language proficiency.
Vague claims of experience across all sectors simultaneously are a warning sign. A provider genuinely strong in medical device documentation, legal translation and financial reporting will describe each one differently - because the requirements are different.
Ask for specific references or examples, not just a sector name.
A provider with genuine experience will answer this specifically and accurately.
A specialist will identify the real risks - terminology standardization, regulatory compliance, register requirements. A generalist will give a generic answer.
Test Before You Commit
Before placing a significant ongoing relationship with any provider, test them on a real project. Not a test translation - a real, paid project with your actual content.
A single test project is more informative than any amount of credential review. How a provider handles a small, real assignment tells you how they will handle a large, critical one.
Consider the Long-Term Cost, Not Just the Project Price
The cheapest project quote is rarely the cheapest outcome. When evaluating translation providers, the relevant costs include:
The Questions That Reveal the Most
If you have time for only a short evaluation conversation, these are the questions that reveal the most about a provider's actual quality culture.
A quality provider will describe a defined investigation and correction process. A provider without genuine quality management will be vague or defensive.
The answer - and how quickly it arrives - tells you everything about whether the certification is current and genuinely maintained.
A quality provider will be able to answer this specifically. A provider who works with anonymous freelancer pools will not.
Ask to see how a glossary is structured, how it is applied, and how it is updated. A provider with a real process will be able to demonstrate it.
What Good Looks Like
A translation partner worth working with over the long term will:
The best translation partners are not the ones who claim to do everything for everyone. They are the ones who are specific about what they do, honest about what they don't do, and structured to deliver consistently over time.
Working With Business Team Translations
Business Team Translations has held ISO 17100:2015 and ISO 9001:2015 certification since 2008.
We apply mandatory independent revision to every project, maintain client-specific translation memories and terminology databases, and assign translators with documented subject-matter expertise across technical, legal, medical, financial and other specialist domains.
Ready to work with a certified translation partner?
ISO 17100:2015 and ISO 9001:2015 certified. 27+ years of experience. We respond to all requests within one business hour.