Aipedia: Patent and trade mark attorneys

AI translation of patents and claims

Aipedia, by the Apex broking team · Last reviewed 2026-10-27

Machine translation can cut the cost of foreign filings and validations, but a single translation error in a claim can change its scope or validity in that country. Where a translation is certified or verified, someone is vouching for it.

Part of: AI in patent and trade mark attorneys

In short

Patent firms may use machine translation, sometimes followed by human post-editing, for foreign filings, European patent validations, priority documents and translating cited prior art. Errors in claims can narrow protection, broaden it beyond what was filed or make it unclear, and they may only surface when the patent is enforced abroad. IPReg's AI guidance points to existing duties of competence and supervision. Where an office requires a certified or verified translation, the signer is responsible for its accuracy. Claims from narrowed or invalid foreign patents usually fall under PI, subject to territorial and jurisdiction terms.

How attorneys use machine translation

Machine translation can be used for reading cited prior art in other languages, preparing first drafts of foreign filing texts and handling translation requirements for validating European patents in some states. Priority documents and claims in other languages may need translating to establish what was originally disclosed. Some firms may use machine translation followed by post-editing by a translator or attorney, or rely on foreign associates who do the same.

The economics push towards less human review. The risk sits in the claims, where one word decides scope.

Foreign associates add another layer. A UK firm instructing an overseas firm may not know whether that firm used machine translation, how much it was edited, or who checked the claims. Clients may see only the UK firm, and will look to it if something goes wrong. Asking associates about their translation workflow, and recording the answer, is part of supervising work that leaves the firm. The same applies to translation agencies, whose terms may limit their liability well below the value of the rights being translated.

The duties that apply

IPReg's AI guidance relies on existing duties in the Core Regulatory Framework. Competence and supervision apply to translation workflows, including those handled by staff and external translators.
Where an office requires a translation to be certified or verified, the person signing is vouching for its accuracy. That duty does not shrink because a machine did the first draft.
Uploading unpublished texts to a free online translation tool raises the confidentiality and novelty concerns in CIPA's client guidance. See confidential invention disclosures.
CITMA's 2025 report says AI output must always get human review.

What can go wrong

A technical term translated with its everyday meaning, narrowing or changing the claim.
Singular and plural, or "comprising" and "consisting of", rendered inconsistently.
Omitted words or lines in long claims, which machine output can hide well.
A priority document translation that misstates what was disclosed, affecting the priority claim.

Illustrative scenario: a firm validates a European patent in several states using machine-translated claims with light review. Years later the client sues an infringer in one state. The local translation of a key term is narrower than the original, and the defendant's product falls outside it. The client claims the value of the lost enforcement from the firm and the translator.

How PI usually responds

A negligence claim over a defective translation would usually fall within IPReg-compliant PI, subject to the policy terms. Points that often matter are the policy's territorial scope and jurisdiction clauses, since the loss arises abroad, and whether the work was done by the firm, a sub-contracted translator or a foreign associate. Insurers may seek contribution from others responsible; see contribution claims. If you use external translators, check their own cover; see PI for translators. Translation errors in claims may only be found long after filing, so claims-made cover and prompt notification matter.

Practical controls

Have claims post-edited and checked by a qualified person who reads both languages.
Keep a glossary of key claim terms for each family.
Run a back-translation or term check on claims for important states.
Use secure translation tools for unpublished texts.
Record who post-edited and who certified each translation.

How Apex helps

Apex arranges PI for patent and trade mark attorneys, and a broker can check territorial scope and how your policy treats AI-assisted translation. See the attorneys hub, AI patent drafting and examination responses.

Sources

Frequently asked

Can I certify a machine-translated patent?

Only if you are satisfied it is accurate. Where an office requires a certified or verified translation, the signer is responsible for its accuracy whoever or whatever produced the first draft. Have claims post-edited and checked by someone who reads both languages.

Who is liable for a translation error made by an external translator?

It depends on the contracts and who the client instructed. A client may claim against the firm it instructed, and the firm or its insurer may seek contribution from the translator. Check translators' contracts and their own PI cover.

Is it safe to use a free online translation tool for patent texts?

Not for unpublished material. Free tools may retain or reuse inputs, which raises the confidentiality and public disclosure concerns in CIPA's client guidance. For published texts the risk is lower, but accuracy in claims still needs checking by a qualified person.

Does PI cover losses from a narrowed foreign patent?

Usually, subject to the policy terms, as a negligence claim. Check the policy's territorial scope and jurisdiction clauses, because the loss and any proceedings may be outside the UK.

Check your PI covers how you use AI

Tell us about your firm and the work you do. A broker will review how your current PI treats AI-assisted work, or arrange new cover. No fee for a quote. Or call 0117 325 0027.

Start a PI quote Request a callback

Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority. Registered in England and Wales, company number 07014570. This page is general information about how AI is used in the profession and how insurance may respond. It is not legal, regulatory or insurance advice on your circumstances, and it does not guarantee that cover will be available or on what terms.