How to Choose a Translation Agency in Belgium: 7 Essential Criteria

Choosing a translation agency is not just about finding the lowest price. The wrong choice can result in legally invalid documents, costly corrections, missed deadlines, and data security breaches. This guide walks you through the most important quality indicators to evaluate before placing an order.

Quality labels and ISO 17100 certification

ISO 17100 is the international standard for translation services. It specifies requirements for the core translation process, including translator qualifications (minimum five years of professional experience or a recognised degree in translation), mandatory revision by a second qualified linguist, and documented quality management procedures.

While ISO 17100 certification is not legally required, its presence signals that the agency has submitted to an independent audit of its processes. It is particularly relevant for companies with high-stakes translation needs - legal, medical, or financial. For sworn translations used in Belgian administrative procedures, however, the critical quality indicator is registration with the SPF Justice sworn translator list, which ISO 17100 does not replace.

Translator qualifications and verification

A reputable agency should be able to confirm the qualifications of the translator assigned to your document. For sworn translations, the translator must be registered on the public SPF Justice list - verifiable at justice.belgium.be. For specialist translations (medical, legal, technical), ask whether the translator has domain-specific training or proven experience. Agencies that cannot provide this information are likely using unqualified or unverified freelancers.

Experience and client references

Established agencies will have worked across diverse industries and document types. Look for:

• Years of operation: agencies with a track record are less likely to disappear mid-project or fail on complex assignments
• Sector specialisation: an agency that regularly serves legal firms, hospitals, or multinational corporations will have refined processes for these document types
• Client reviews and testimonials: look for reviews on independent platforms, not just self-published testimonials. Check for consistency in feedback about accuracy, timeliness, and communication

Specialisation by language and subject matter

Not all agencies are equally capable in all language pairs or domains. An agency claiming to cover 200 languages with a team of ten staff is likely subcontracting to unknown freelancers. Prefer agencies that have demonstrably deep expertise in the specific language pairs and document types relevant to your needs, even if their overall language range is narrower.

For Belgian companies and individuals, the critical language pairs are typically FR-EN, NL-EN, FR-NL, and the minority language pairs most relevant to the Belgian immigrant population (Arabic, Turkish, Romanian, Polish, Portuguese). Ensure the agency has qualified sworn translators for these pairs, not just standard translators.

Responsiveness and communication standards

A reliable agency responds to quote requests within one hour, provides a fixed (not estimated) price before starting work, and communicates proactively if any issue arises. Test an agency's responsiveness with an initial quote request before committing a sensitive or urgent project. Agencies that take more than 24 hours to respond to a quote request, or that provide only vague price ranges, are unlikely to perform better under the pressure of a real deadline.