[Baertram]

If you write chat to the zone chat or say chat others are able to read it. But no addon can automatically write to it!
They can only add it to the chat edit input box and you need to press the return key to send it. That's what I meant.
They can preselect the chat's channel, like zoneen or zonede or say or group or whisper, but you need to accomplish the sending via presskng the key (for security reasons). This way addons are able to share data via the chat and to not disturb others the rp addons might use non used chat channels on the servers, like the zonejp (Japanese) on the EU servers, or zonede (German) on the US server.


Addons are only able to put it in the debug messages or local chat automatically. So only you see this.
Try in the chat input box:
/script d("Chat message only I'm able to see")
This is a debug message which should only be shown in the chat tab where the system messages are enabled in the chat tab channel options. So only you can read this