Give a Character an Accent or Dialect in an AI Drama

Quick answer: Every character has a Voice description — one line of free text that says how the voice sounds. Put the accent in it. The line travels with every sentence that character speaks, and the video model performs it while it renders the shot, so a light Taiwanese Mandarin in the description is a character who speaks with a light Taiwanese accent from their first line onward. One thing decides whether this works at all: the character must have no audio attached. If a preset voice was matched or a recording uploaded, the description is not used, and an accent written in it goes nowhere. Check the badge before you generate — it takes ten seconds and it is the whole difference between working and not. How character voices work.
Still from “The Last Envelope”, an AI short drama generated end-to-end by SceneMixer (6 characters, 1 episode)
Sample: “The Last Envelope” — Realistic HD, 1 episode, produced end-to-end by SceneMixer from the script · watch the episodes

Open a character in step 2 and the Voice description box is at the bottom of the dialog, under the appearance description. That single box is where an accent lives.

How an accent reaches the screen

Nothing about the voice is recorded, dubbed or stitched together afterwards. When a segment is generated, the video model renders the picture and says the lines in the same pass, and the description of each speaking character is handed to it as the brief for that voice. That is why the mouth shapes match the words: the voice is part of the generation, not a layer added to it. Dialogue and sound in one generation.

The accent words are not filtered, shortened or dropped: “soft and breathy, a light Taiwanese Mandarin, unhurried” travels with every line that character speaks, in every segment — and nothing asks whether you meant it. If you want Hong Kong-accented Mandarin, you say Hong Kong-accented Mandarin.

The one job the voice library cannot do is accents. It is organized by language — Chinese, English, Cantonese — and a match is chosen by gender, age band and manner. There is no Taiwanese-accented entry, no Scottish entry, no Brooklyn entry, and the accent words in your description play no part in choosing one. Accents come from the description; the library is for holding a voice steady. How character voices work.

Add it in four steps

  1. Open the character. In step 2, Characters & Scenes, click the character’s card. The same field is in the character’s details in the episode editor; both are the one description that follows the character around the project.
  2. Read the voice row before you type. If it offers Auto-match voice, Pick from library and Upload Voice, this character has no audio — that is the state you want, and everything you write in the next step will be used. If a voice is attached instead, see the badge check below first.
  3. Add the accent to the Voice description. Keep what is already there — timbre, pace, manner — and put the accent at the end. The box takes a full sentence or two; there is no length limit to work around, and one sentence is usually enough.
  4. Save and generate. The accent applies from the next generation onwards, to every line the character speaks.

Check the badge: is the description being used?

Two places show which of the two modes a character is in. On the character card in step 2, a small speaker icon sits next to the name when an audio voice is attached — no icon means the description is in charge. In the storyboard editor, the @ menu has a Voice tab listing the cast: each character has a speaking icon, and one who has no audio also gets a small Text only tag next to it. Hovering the icon says which of the two it is — Voice assigned, or Voice description only (no audio). The icon without a tag is the green light; the speaker means an audio sample is attached and the description, accent included, is not what gets performed.

If you find yourself in the wrong state, open the character and use Delete Voice — the confirmation says the remote file is kept, so nothing is destroyed and you can pick a voice again later. It is free, and it takes effect on the next segment you generate. Then your accent words are back in play.

What to write, and what you get

Say which accent, and say how much of it. “An accent” is not a description; “a light Taiwanese Mandarin” is. These are the same one-line format the description already uses, with the accent appended:

What you writeWhat you are asking for
Low and warm, unhurried, a light Taiwanese MandarinMandarin with a Taiwanese accent, said gently and without hurry
Bright and quick, Hong Kong-accented Mandarin, clipped endingsThe Hong Kong flavour on Mandarin, with the clipped rhythm that goes with it
Relaxed and a little husky, a Sichuan accent, conversationalA Sichuan-flavoured Mandarin, casual rather than performed
Neutral standard Mandarin with only a trace of a Northeastern flavourStandard Mandarin with the faintest regional colouring
Measured and gravelly, a soft Scottish lilt, unhurriedEnglish with a gentle Scottish lilt
Warm and slow, a soft Southern US drawlEnglish with the stretched vowels of the American South
Flat and weary, a London accent, clippedEnglish that sounds like London, tight and tired
Light and quick, English with a slight French accentEnglish spoken by someone whose first language is French

Three habits make it work.

Accent, dialect, or a different language?

Three different things, three different places to put them. Mixing them up is the usual reason an accent “does not work”.

What you wantWhere it goes
The cast speaks the project’s dialogue language with a regional flavour — Taiwanese, Hong Kong, Sichuan, Northeastern, Shanghai, Beijing-style erhua, a rural English drawlThe character’s Voice description. The lines stay in the project’s dialogue language and wear that region on top
The lines themselves are written in that region’s idiom — actual regional expressions rather than standard onesThe dialogue itself, in the script or in the storyboard line. Wording plus accent together is what makes a dialect land
The cast speaks a different language altogether — Cantonese, English, JapaneseThe project’s dialogue language setting, not the description. Cantonese is available there as a dialogue-only option. How to set the dialogue language
This one line is angry, whispered, hurried, or stressed on a wordThe delivery note in brackets at the start of that line. Do not repeat the accent there — it is already on the character. Dialogue in the storyboard

The distinction that matters: an accent changes how the language is spoken, a dialect setting changes what is spoken. Asking for both in one place fights itself — writing “speaks Cantonese” in a description on a project whose dialogue language is Mandarin leaves the model with two instructions about the same sentence that pull against each other. If you want Cantonese, set Cantonese as the dialogue language and put any regional colouring in the description on top.

When the accent does not come through

What you seeWhat it comes fromWhat to do
Nothing at all changes after you saveThe character has audio attached, so the description is not what is performedCheck the badge; on the card use Delete Voice, then generate the segment again
The accent is there but too faintThe strength word was vague, or the region was named only in general termsName it more precisely and grade it — “a clear, unmistakable Sichuan accent” — then regenerate that segment
Old episodes still sound the way they always didFinished segments keep the voice they were shot with; that is what makes a delivered episode stableRegenerate the segments where you want the accent. It costs the same as generating them the first time. What each clip fix costs
The accent is missing from a clip you fixed after the factThe finished-clip voice panel synthesizes speech with preset voices from the library, so an accent written in the description does not come out of itRegenerate the segment instead of redubbing it. Changing a voice in a clip you already have
The voice is right but drifts between segmentsThe description mode trades a little consistency for freedom — each generation performs the words afreshAccept it, or move that character onto a preset voice from the library and give up the written accent for that character
The character’s voice is fine but a stranger’s line is oddLines spoken by someone outside the cast do not carry a character’s descriptionGive that speaker a character card of their own and write their accent there too, or leave it as a one-off line

What it costs

One thing to know before you reach for an uploaded voice to solve this: an attached recording and a written accent are alternatives, not partners. Attach audio and the description stops being performed — accent words included. Members who want a specific regional voice use the upload deliberately, in place of the description. How character voices work.

FAQ

Does writing an accent really change how the character speaks?

Yes. The voice description travels with every line that character speaks and is performed as written: the video model says the line and renders the shot in one pass, so there is no separate dubbing step that could drop it. What you do not get is a strength setting — if an accent comes out too light, say so more explicitly and generate that segment again.

Why did my accent have no effect?

Almost always because the character has audio attached: a preset you matched or a recording you uploaded. With audio in place the description is not what the model performs. On the character card use Delete Voice to go back to the description, then generate the segment again.

Can I add an accent after I have already generated episodes?

You can, and everything you generate from then on uses it. Segments you already shot keep the voice they were shot with; regenerate the ones where you want to hear the accent, at the usual cost of generating a segment.

Can I add an accent from the voice panel of a finished clip?

No. That panel synthesizes speech with preset voices from the library, so an accent written in the description does not come out of it. An accent only arrives in a segment that is generated again.

Does the voice library have regional accents in it?

No. The library is organized by language — Chinese, English, Cantonese — and a match is chosen by gender, age band and manner, not by the accent words in your description. The description is the only place an accent comes from.

Is an accent the same thing as the dialogue language?

No. An accent or dialect keeps the project’s dialogue language and puts a regional flavour on it, so it goes in the voice description. To change the language itself, set the project’s dialogue language, where Cantonese is available as a dialogue-only option; writing speaks Cantonese in the description while the dialogue language stays Mandarin asks for two things at once, and they pull against each other.

Do I have to repeat the accent on every line?

No. It is a property of the character, written once in the voice description, and it covers every line they speak. What changes line by line — mood, pace, a word under stress — goes in the delivery note in brackets at the start of that line.

Can two characters have different accents, and what about characters who are never seen?

Both. Each character carries their own voice description, so accents never interfere. Voice-only characters — narrators, the person on the other end of the phone — have a voice description too, and the accent works the same way for the lines they speak.

Give the cast a place to sound like

Open a character, check the badge, and add one sentence of accent to the voice description.

Open the editor

Updated October 10, 2026

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