You can't make the name of the link different than what is said when it gets clicked. But, if needed, you should be able to change what your script is waiting to be said so that it catches things however you want to say them. An example would be if your NPC said "bind your soul", most players would type "bind my soul", but if you clicked the link, it would say "bind your soul". In this example, you could just have the NPC look for either "bind" or "soul" to be said so that both phrases would work as replies.
It is possible to code it so the players don't actually say anything, but it may be better that they do. All we would have to do is do the parse of the text right there instead of sending the message as a say. It probably wouldn't be bad to do it that way, other than people maybe clicking the links to annoy people and no way to tell for sure who it is causing the spam.
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