Board Thread:General Discussion/@comment-26492438-20150613104655/@comment-24991718-20150616120603

For the dragon born to use their shouts hey have to absorb a dragon soul. The last dragonborn didnt meat a dragon and kill it until the events of skyrim so they could not use their shouts before this. Miraak is the same he had to absorb dragon souls to use his shouts.As for talos I am not sure because I dont think he ever met any dragons.