Build me web app that will integrate a translation API to use our chat platform to interact with web visitors

We have a commercially purchased chat platform used by call center agents. The chat platform is accessed through web browser and used to provide chat support to visitors on web sites. We have a commercially purchased translation server (similar to Google Translate) with API. We'd like to build an application that will integrate the translation APIs and allow call center agents to use the chat platform to converse with visitors in different languages. The application needs to work for multi users and provide detailed logging and a few other extended capabilities. Attached is a screen capture inside a Chrome window of the chat with two active chats. The Chrome frame is missing due to the way the capture was done. The application we build should run on the agent's desktop, use a browser interface and extract the content from the browser, displaying information and controls to the call center agents in a different panel.