This is a Chrome Extension used to translate an English word into Chinese. The translated word will show as a Chrome Notification.
Select a word, use Ctrl+Shift+Y / right click and choose "translate" option / click the extension icon, that's it.
go to chrome://extensions/ -> check the developer mode -> Load unpacked extension..., choose the project path.
By default, the shortcut for this Ctrl+Shift+Y (or Command+Shift+Y on Mac), you can change it in "Keyboard shortcuts" in chrome://extensions/