Perform find and replace on post content when posts are displayed.
Download or clone the Word Filter plugin repo into your esoTalk plugin directory:
cd ESOTALK_DIR/addons/plugins/
git clone git@github.com:esotalk/WordFilter.git WordFilter
Navigate to the the admin/plugins page and activate the Word Filter plugin.
Create definitions.WordFilter.php in your language pack with the following definitions:
$definitions["Word filters"] = "Word filters";
$definitions["message.wordFilterInstructions"] = "Enter each word on a new line. Optionally specify a replacement after a vertical bar (|) character; otherwise, the word will be replaced with asterisks (*). Words are case-insensitive. Regular expressions are allowed.";