Voice Accent Changer For WebGL Application In Real Time

We have unity application with backend support of Nodejs and Socket Io for event handling.
We have voice chat functionality in this webgl application.
The connection between Nodejs and Unity is based on Server.js and the Client.js file attached with Unity Build where each client.js file work as a Client, in Server-Client communication. Using native javascript we have achieved the functionality of voice chat in real time.

Query
I want to add the real time voice accent changer in streamline voice without any delay? Is it possible? The server and the Unity code is deployed on the Ubuntu server VPS.

I want that user can change their native accent to American, Australian, Canadian etc..

Kindly help me to provide maximum possible solution for this scenario.
I am ready to apply solution in python and javascript both.

I have tried the API to change the accent on server.js side and emit the buffer array data of voice to client.js using socket.