How to Brief a Translation Proofreading Project: A Practical Guide

Key Takeaways

• A clear, detailed brief is the single most important factor in ensuring a translation proofreading project is completed accurately, on time, and to the right standard.
• The most common briefing mistakes are failing to supply the original source document, not specifying the intended use of the translation, and not providing existing terminology glossaries or style guides.
• Reviewers need both the source and target documents to conduct a proper bilingual review. Supplying only the target language text results in standard proofreading rather than true translation quality review.
• Specifying the review level required (light post-editing, full post-editing, or full ISO 17100 revision) upfront prevents scope misunderstandings and ensures the right workflow is applied.
• For regulated or certified documents, informing the proofreading agency of the submission body or regulatory authority upfront allows reviewers to flag compliance terminology issues during review rather than after delivery.

Arriving at a translation proofreading agency with an existing translated document and asking for it to be "checked" is one of the most common briefing scenarios in the industry, and one of the most frequently under-specified. The quality of a proofreading review depends directly on the quality of the brief provided.

This practical guide sets out exactly what to include in a proofreading brief to ensure your reviewer has everything they need to deliver a thorough, accurate, and useful quality review.

1. Always Supply Both Documents

The single most important thing to include in a proofreading brief is the original source document alongside the existing translation.

Translation proofreading is a bilingual process. The reviewer works through the target language text segment by segment against the source, checking that the translation accurately renders the meaning, tone, and intent of the original. Without the source document, the reviewer can only proofread the target language text in isolation, checking grammar, spelling, and fluency but unable to verify whether the translation is actually accurate.

If your source document is confidential, inform the proofreading agency upfront so that appropriate NDA and data security arrangements can be confirmed before files are shared.

2. Specify the Intended Use

How a translated document will be used determines the standard it needs to meet and therefore the depth of review required.

An internal reference translation of a foreign-language supplier contract, used only for background context by your legal team, requires a different review standard than the same contract being submitted as a binding dual-language agreement in arbitration proceedings.

Tell your reviewer:

• Whether the document is for internal reference only or external publication or submission.
• The specific body or platform it will be submitted to, if applicable (UKVI, a court, a regulatory authority, a marketplace platform, a publisher).
• Whether certification and a Certificate of Accuracy are required.

3. Specify the Review Level

Not every proofreading project requires the same depth of intervention. Specifying the review level upfront prevents scope misunderstandings and keeps costs predictable.

Light review: Correct factual errors, mistranslations, and critical grammar issues. Do not restyle or rewrite fluent passages. Suitable for broadly accurate translations needing a final accuracy check.

Full revision (ISO 17100): Correct all accuracy, terminology, grammar, consistency, register, and fluency issues. Bring the translation up to publication standard. Required for certified translations, regulated documents, and published content.

MTPE (machine translation post-editing): Specify whether the translation was produced by a machine translation engine and which one, as this helps the reviewer calibrate the expected error patterns and workload. Learn more about our MTPE service.

4. Provide Existing Glossaries and Style Guides

If your organisation has established approved terminology for specific products, processes, legal entities, or brand names, share this with your reviewer before work begins.

A reviewer working without a client glossary will make reasonable terminology choices based on standard usage in the target language. Those choices may be perfectly correct in isolation but inconsistent with your established house terminology, requiring correction after delivery.

If no glossary exists, inform the reviewer of any terms that must remain untranslated (product names, registered trademarks, brand names) and any terminology preferences you are aware of.

5. State Any Previous Reviewer Feedback

If the translation has already been through one round of review, or if you have specific concerns about particular sections, share that context with the proofreader. This allows them to pay particular attention to flagged areas rather than discovering the same issues independently.

6. Provide a Realistic Deadline

A thorough bilingual proofreading review of a complex legal or technical document takes time. Reviewers typically work through 2,000 to 3,000 words per hour for full ISO revision of specialist content. For a 10,000-word contract, that is a minimum of three to five hours of focused review time, plus briefing, query resolution, and final delivery.

Requesting same-day turnaround on complex specialist documents forces reviewers to prioritise speed over thoroughness. If a genuine urgent turnaround is required, discuss this upfront so the agency can allocate appropriate resource rather than rushing a single reviewer.

7. Confirm Data Security Requirements

If your document contains commercially sensitive, legally privileged, or personal data, confirm your security requirements as part of the brief. A professional translation proofreading agency should be able to provide:

• Individual non-disclosure agreements (NDAs) for all reviewers assigned to the project.
• Secure, encrypted file transfer rather than open email attachments.
• Confirmation that the document will not be processed through public AI translation tools.

For medical, legal, and financial documents in particular, data security is not an afterthought. It is a briefing requirement.

Get a Free Proofreading Quote

Global LTS provides ISO 17100:2015 certified translation proofreading and post-editing services across 120+ languages. Whether you need an independent review of an existing translation, MTPE of machine-generated content, or full re-certification of a previously translated document, our specialist reviewers are briefed to your specific requirements from the outset.

To discuss your proofreading project or request a free quote, visit our translation proofreading services page.