event Creature:onSay(text, type)

[Zbizu]

Explanation of what you want to do that is currently impossible

changing the output text based on input this way:
return text, type

if onSay is misleading, we can name it onSpeak

Desired functionality

replace text and talktype of spoken message

return text, type to send the message
return false to cancel it

Available workarounds

none for players
if statements for npcs
rewriting yell system to lua (creaturescript onThink) for monsters

note: since other creatures have other ways to deal with it, we can make it players only to save performance

Prior art

example code that could be written with such function:

function Creature:onSay(text, type)
	if self:isPlayer() and self:getStorageValue(someStorage) == 1 then
		type = TALKTYPE_MONSTER_SAY
	end
	
	return text, type
end