THE SHORT VERSION
Build language-specific terminology and review the translated script before generation. Final-file checks still matter after the translation is rendered.
Schedule translation review before generating the final video. HeyGen’s proofreading lesson, checked on 30 October 2026, says its Proofreader is part of the translation workflow and cannot be applied as the same editing stage after a translation is fully generated. That makes review order a practical concern.
Prepare a source the reviewer can trust
Start with a video and transcript you are authorized to translate. Correct the source transcript’s names, numbers, and technical phrases before treating it as a reference. Confirm the intended audience and language variant with the reviewer.
Permission to distribute a source video should not be assumed to cover synthetic voice or likeness use. Resolve that scope with the speaker and check the applicable provider conditions before uploading. This guide does not grant rights or verify any particular account’s permissions.
Build a small terminology sheet
List product names, company names, recurring technical terms, and phrases that should remain untranslated. Add an approved target-language form and a short explanation where context matters.
HeyGen’s Brand Glossary guide recommends separate glossaries by language because translation rules vary. Keep an editorial copy of the terms outside the tool as well. That gives a reviewer a clear reference and avoids applying one language’s preferred spelling to another.
Do not overload the first review with every possible term. Prioritize words that affect meaning, branding, safety instructions, or the identity of people and places.
Review before generation
The documented route begins with Translate and Video Dubbing, then source selection and settings. HeyGen describes Review and Edit as the entry to Proofreader before the final video is generated. Interfaces and plan access can change, so follow the current guide rather than guessing at controls that are missing.
Ask a fluent reviewer to check meaning, omissions, tone, and natural phrasing. A literal translation can preserve every word and still fail to communicate the intended point. Check amounts, units, dates, and calls to action separately from stylistic polishing.
Use previews to assess pronunciation and flow. Keep a list of approved changes and the glossary version. Do not approve a language you cannot assess solely because the synthetic delivery sounds confident.
Check the rendered file again
After generation, review the actual file for speech, subtitles, timing, and the relationship between translated audio and picture. Make sure a longer phrase does not collide with a visual transition or leave essential text unreadable.
If the final translation needs correction, consult the documented recovery options. HeyGen lists starting a new translation with proofreading enabled and other routes; do not assume a completed render remains editable in the pre-generation proofreader.
Have a reviewer fluent in the target language approve the translation, pronunciation and lip synchronization in the complete exported video.