‘This Segment’s Dialogue Is Not in the Project’s Dialogue Language’: Why, and the Two Ways Out

Quick answer: Every project has a dialogue language, set in Step 1. Before a clip is generated, the segment’s spoken lines are checked against it; if they are in another language the click is refused with this message and nothing is charged. Two usual causes: you edited a line by hand into another language, or the writing model kept a line in the language of the original script. Two ways out: fix the lines by editing them in the segment, or, if the mixed language is intended — a foreign phrase, a song — confirm the dialog and the clip is generated as written.

Still from “Crimson Vow”, an AI short drama generated end-to-end by SceneMixer (4 characters, 1 episode) — Sample: “Crimson Vow” — Realistic HD, 1 episode, produced end-to-end by SceneMixer from the script · watch the episodes

Open the segment and read the lines after the speaker tags: the language you see there is what the check saw.

Where the check happens

At the moment you click generate on a segment, on that segment only. It looks at spoken lines (text after a speaker tag), not at the picture description, and it compares their script to the project’s dialogue language. The rest of the episode is not affected. Choose the Dialogue Language.

A storyboard segment: location, time and weather fields, then numbered shots with durations, asset chips and spoken lines — The check runs when you click generate; the lines it means are the ones after speaker tags in this segment.

Why lines end up in the wrong language

Hand edit: you typed a line in another language; retype it in the project language. Model slip: the storyboard came out with a line in the wrong language despite the setting — often a line the original script had in another language; the site catches most of these before saving, this check catches the rest. Edit the line. Regenerating the storyboard does not help, because it copies the outline’s lines word for word; and the dialogue language itself cannot be changed after the script is read. What you can change after the read.

Fixing the lines

Edit the segment text and change only the words after the speaker tag; keep the tag and the delivery note. Save; generate again. Only the segments you generate are checked, so you can fix them one at a time. Dialogue Lines, Voice-Over and Captions.

Generating anyway

If the other language is intended, confirm in the dialog and the clip is generated with the lines as written; the model speaks them in that language as best it can. The confirmation is per click; the next generation on that segment asks again unless the lines change.

What is not the cause

The interface language and the language you read the storyboard in do not matter here; the check reads the working text. Captions and picture descriptions are not checked. Remakes have their dialogue language fixed at the read, so this message on a remake means a hand edit.

Cause	Fix
A line edited by hand into another language	Retype the line in the project language
Model wrote one line in the wrong language	Edit that line
Foreign phrase or song on purpose	Confirm and generate

FAQ

Was I charged?

No. The check runs before anything is sent.

Does confirming change the project's dialogue language?

No. It only lets this generation proceed.

Will the clip pronounce the other language correctly?

Best effort; a line in a language the project was not set up for may not sound natural.

The message appears on every segment of the episode.

The outline’s lines are in another language, usually the original script’s. Edit the lines, or confirm if that language is what you want; regenerating the storyboard keeps the outline’s language.

Can I turn the check off?

No; confirming per click is the override.

Fix the line, or confirm and shoot

The check only makes sure the clip speaks what you meant.

Open the editor

Updated September 27, 2026