Legal, safety, and medical copy must not rely on machine translation alone
Aliases: high-risk translation review · human-in-the-loop translation · safety-critical localization
What it is
Human assurance for high-risk translation means that legal rights and duties, safety instructions, medical information, and other consequential copy cannot treat unreviewed machine output as final. MT can supply a draft or assist a professional, but a person who understands the target language, domain meaning, and use context must own the release decision. “Must not rely on MT alone” is a quality and accountability boundary, not a claim that human translation is infallible.
Why it happens
In high-risk copy, an error in negation, dose unit, time condition, responsible party, or warning strength can alter behavior and legal effect. Machine output may be fluent enough that non-specialists fail to notice an omission, term error, or inconsistency, and the model does not know whether a string controls an irreversible action. Qualified review compares target with source, domain rules, and the rendered interface, checking propositions, numbers, scope, actions, and consequences and leaving traceable approval. Risk follows impact and exposure, not surface naturalness alone.
Where it stops holding
Legal, medical, and safety content are common categories, not an exhaustive list; financial commitments, privacy consent, identity verification, and critical infrastructure may carry comparable risk. Conversely, generic navigation on a medical site need not receive the same review as a dosing instruction. Professional review cannot be reduced to grammar polishing or performed target-only by someone without domain competence. Jurisdiction- and sector-specific obligations change, so this card does not replace legal or clinical governance advice.
Applying it
- Tag content by the consequence of mistranslation rather than department name alone, especially negation, quantities, units, deadlines, eligibility conditions, warnings, and irreversible actions.
- Require a reviewer with target-language and domain competence to compare against the source, add an independent second review when warranted, and record version, owner, and approval basis.
- Validate line breaks, emphasis, links, reading order, and control relationships in the final interface so correct wording is not changed by presentation or string composition.
- Provide emergency withdrawal, user reporting, and change-triggered rereview. Do not carry approval forward automatically after source, model, terminology, or product behavior changes.
Related
- Same group: S1.08.1 Machine translation suits high-volume, low-risk content · S1.08.2 UI microcopy has a higher error rate than long-form text · S1.08.4 Post-editing cost must be included
- Adjacent: S1.05 Translation context and string reuse · T2.03 Error messages and recovery paths
- Search terms:
safety-critical localization·human review of MT·high-risk translation assurance