I want to replace the stock/canned/standard follower dialog my companion is using that comes with any of the stock followers in the game and use the custom voice from my voice actress but I want to do it without making any dirty edits to the existing Follower dialog.

Has anyone done this and how? I assume it's extended or replaced somehow?

(Moving to CK forum)

Emma would know this one. I would presume it would be along the lines of adding your new dialogue (duplicating where necessary) and putting it higher up the tree so that it gets selected before any of the vanilla dialogue, thereby overriding it without breaking the existing dialogue.