Overwrite config doesn't work for transcription language

[georgi-mitsev]

What happened?

Hello team,

Im using you React SDK for my application.

I want to use transcripts via webhook via TRANSCRIPTION_CHUNK_RECEIVED
Initially when speaker start talking I receive the information I want on the default language I have setup.

However a key functionality for my application is changing the language of the speaker.
For that reason, I call in my function for changing the transcription language.

api.current.executeCommand("overwriteConfig", {
          transcription: {
            enabled: true,
            useAppLanguage: false,
            preferredLanguage: newLanguage,
          },
        });

but after that I notice the transcript language is not changed, because you just overwrite redux state

 case OVERWRITE_CONFIG:
        return {
            ...state,
            ...action.config
        };
    }

without reinitialise the config.

I give you a small chunk of my code, for better understanding.

<JaaSMeeting
         ....
          jwt={token}
        ....
          configOverwrite={{
          ....
            transcription: {
              enabled: true,
              useAppLanguage: false,
              preferredLanguage: locale,
            },
          ....
        }}
        onApiReady={(externalApi) => {
             externalApi.addListener("transcriptionChunkReceived", (event) => {
              console.log(
                `🌐 Transcription chunk received: ${event}`,
              );
            });
       })
....
/>

FYI, Initially when user is joined in the conference, your application execute this code
logger.info(Transcriber language set to ${safeBCP47Locale});
but after overwriting the log is not executed, which means language is not updated.

Platform

• Chrome (or Chromium based)
• Firefox
• Safari
• Other desktop browser
• Android browser
• iOS browser
• Electron app
• Android mobile app
• iOS mobile app
• Custom app using a mobile SDK

Browser / app / sdk version

"@jitsi/react-sdk": "^1.4.0",

Relevant log output

2025-06-27T14:42:14.899Z [features/transcribing] Transcriber language set to en-US

2025-06-27T14:42:31.621Z [modules/API/API.js] API command received: overwrite-config
API.js:868 2025-06-27T14:42:31.622Z [modules/API/API.js] <overwrite-config>:  Overwriting config with: {"transcription":{"enabled":true,"useAppLanguage":false,"preferredLanguage":"de-DE"}}

Reproducibility

• The problem is reproducible on meet.jit.si

More details?

No response