Is there any way to see the conversation log in Witcher 3?

Solution 1:

No, there isn't any way to do this in game. There is also no mod that allows you to replay conversations. I went through all of the audio and UI mods in nexusmods and couldn't find any that allowed this.

There was also a couple steam forum posts that talked about rewinding dialogue and the closest answer that was actually given was to create a save state or quicksave before your conversations so you can always quickload and redo the conversations.

Solution 2:

You can find out what decisions you have made by looking at the quest log the bard will give a different telling of the story depending on what choices you made.