Localization
What Is AI Dubbing?
AI dubbing adapts spoken video for another language. Learn how it works, when to use it, what to review, and how it differs from subtitles and lip sync.
LipDub Team
Quick Summary
AI dubbing generates a new-language voice track for a video you already made. What it is, the workflow, what needs adapting, and how to choose between subtitles, dubbing, and lip sync.
AI dubbing uses AI to translate and replace a video's spoken audio in another language. With dubbing alone, the visuals stay unchanged; add lip sync when the speaker's mouth movements also need to match the translated audio. Either way there's no studio session, no voice casting, and no reshoot: viewers hear your content in their language instead of reading it at the bottom of the screen.
How AI dubbing works
The workflow runs in five stages: prep, translate, generate, optional lip sync, then review. Two of them, the translation pass and the review, are where quality is decided. Here's what each stage means:
Prepare:
Highest-quality master, clean audio, final script on hand.
Translate and refine:
The AI translates; you refine names, tone, and phrasing on text before anything renders.
Generate dub:
The new voice can be a clone of the original speaker, a library voice, or audio from your own voice actors.
Add lip sync if needed:
If the speaker's face is on camera, sync the mouth to the new language so the video reads as native.
Review + export:
Nothing ships unwatched.
For the full step-by-step, see the how to translate a video guide.
What actually needs adapting
A dub is more than swapped words. Before publishing, these all need a decision:
Dialogue. Translated dialogue expands or contracts against the original, so the wording often needs adapting for natural timing and pacing within the cut.
Names and terminology. Product names, people, and taglines need a ruling: keep the original, or use an approved translation.
Pronunciation. Names, numbers, and acronyms are where generated voices stumble first. Listen for them specifically.
Tone. Formal or informal address is a brand decision. So is energy: a flat read on an excited original is a failed dub.
On-screen context. Dubbing covers the spoken word only. Captions burned into the edit, supers, and end cards are a separate edit task.
The mix. A dub should sit in the original soundscape. LipDub re-adds the original music and effects, so the final cut sounds like the original video, not a voice floating over silence.
Never publish the generated version as-is. Run it through the checklist below first.
Where AI dubbing fits
Marketing videos. A campaign that performed at home, shipped to new markets with the same footage and a native-language voice. Check for supers and end cards that need their own edit-level treatment per market.
Product walkthroughs. Screen recordings and demos where the narration gets localized while the UI on screen stays unchanged. Flag any spoken references to on-screen buttons or menus, since those stay in the original language.
Training and educational content. Course libraries and internal training adapted for teams and learners in their own language. Terminology needs to stay consistent across every module, and pacing matters because learners pause and rewind.
Creator videos. One channel's content published to new language audiences without a second production. Titles, descriptions, and captions need their own per-language pass alongside the dub.
The common thread: the video already exists and already works. Dubbing changes who can watch it, not what it is.
Subtitles, dubbing, or lip sync: choosing the format
Two real choices, one optional layer. Subtitles or dubbing is the actual either/or: translated text on screen, or a new voice track. Lip sync is not a third alternative; it's a visual layer added on top of dubbing when the speaker is on camera, so the mouth matches the new audio.
Subtitles work when viewers are comfortable reading: short social clips, markets with strong subtitle habits, or content watched on mute. They're the cheapest option, and they cost the viewer's eyes; nobody watches the video while reading it.
Dubbing replaces the audio so viewers hear the content natively, covering everything from voiceover explainers to off-screen narration.
Lip sync is the layer to add when an on-camera speaker's delivery is the point. A founder spot or a spokesperson ad with mismatched lips reads as translated content within seconds; with lip sync, the video passes as an original, not a translation. The deeper technical dive is on the lip sync product page.
The review checklist
Before publishing, check:
Does the translation preserve the intended meaning, confirmed by a native speaker?
Are names, numbers, product terms, and acronyms correct, on text and again by ear?
Do the tone and energy of the voice match the original performance?
Does the timing fit the cut, with pauses where the original breathes?
Has on-screen text been handled in the edit, and has someone watched the final version end to end at full resolution?
How LipDub fits
Upload the video, translate and refine every line in the editor before generating, dub with a cloned voice, a library voice, or your own voice actors, add lip sync when the speaker is on camera, review, and export in 80+ languages at broadcast quality. Traditional dubbing runs weeks and studio budgets per language; the comparison is on the LipDub vs. traditional dubbing page.
FAQs
What is AI dubbing?
AI dubbing generates a new-language voice track for an existing video, replacing the spoken audio while leaving the footage untouched. Viewers hear the content in their language instead of reading subtitles.
How is AI dubbing different from subtitles?
Subtitles translate the words as on-screen text; the audio stays in the original language. Dubbing replaces the audio itself, so the viewer listens natively instead of reading.
How is dubbing different from lip sync?
Dubbing changes the voice. Lip sync is an added visual layer that matches the speaker's lips to the new language frame by frame. Use dubbing alone when no face is on camera; add lip sync when the person on screen is the point.
Can I edit translated dialogue before generating the video?
Yes. LipDub's translation editor lets you refine any line before generation, and a custom prompt sets tone, formality, and word choice across the whole script.
What should I review before publishing a dubbed video?
Five things: translation accuracy, names and terminology, pronunciation and tone, timing against the cut, and a full-resolution watch of the final version, including any on-screen text handled in the edit.
Ready to hear your video in another language? The video localization workflow covers upload to export, and pricing is per minute of video. The first video is free.
