My apologies I misunderstood the question, could you maybe give me an example. Otherwise try to go into the Game Explorer, press F5 and look at game.Chat. Copy the files from the location and paste them into game.Chat whilst you are no longer testing. Remove the files except game.Chat.ClientChatModules.ChatSettings and edit that file to your liking.
The above image is the highlighted .lua module script that should contain your settings.
Advisory never to fork if you are only making slight changes to systems! You should always try and do what you can without forking. Only fork if it’s necessary to make changes and/or if you’re making major changes to the functionality of the code.