ISO certificates often appear at the bottom of websites, inside proposals or on supplier qualification forms.
To a buyer, they can easily become another logo.
But ISO 17100 is specifically about translation services, and its value lies in the process behind the certificate — not the artwork on it.
1. Professional competence is part of the system
ISO 17100 requires translation service providers to establish and maintain evidence of the competencies and qualifications needed for translation work.
During LTI’s 2026 surveillance audit, the auditor sampled processes covering the competence and qualifications of translators, revisers, reviewers and project managers.
The point is simple: professional translation is not defined merely by someone being bilingual.
2. Translation and revision are separate steps
One of the clearest features of LTI’s certified scope is that translation services include revision by a reviser other than the translator.
That matters because the second professional is not simply checking spelling.
Revision examines the target text against the source and provides an independent layer of professional scrutiny.
3. Quality starts before translation begins
The standard does not begin when somebody opens the file and starts translating.
It also covers pre-production activities: project feasibility, quotations and agreements, preparation, administrative and technical requirements, linguistic requirements and information handling.
A good translation outcome depends partly on decisions made before the first sentence is translated.
4. The production process is controlled
The audit assessed whether LTI’s linguistic process followed the minimum sequence required by the standard:
Translation
Check
Revision
Final verification
That is important because quality assurance is not one final action added at the end. It is built through defined stages.
5. Project management matters
Clients rarely interact only with the translator.
Project managers coordinate schedules, files, instructions, resources, queries, delivery and feedback.
ISO 17100 recognises that a translation service's quality depends on the wider system around the linguist, not simply on one individual's ability.
6. Information and feedback are part of quality too
The 2026 audit also examined information security and safekeeping, post-production activities, client feedback and corrective action.
That may sound less glamorous than translation itself, but it is part of what makes a professional service accountable.
So what does ISO 17100 certification mean to a buyer?
It does not mean that mistakes become impossible.
It does mean that the translation service is being delivered through a defined professional framework that can be independently audited.
For LTI, that is why the certification still matters after ten years.
Professional translation is a process.
Not simply a translated file.