Board Thread:Lore Discussion/@comment-13842697-20140501125038/@comment-14027812-20140501131318

Mankar Camoran is noted as being able to "speak fire" in his Commentaries, although that's likely because he was Dragonborn. I've interpreted that part of the Dragon War legend as Kyne and Paarthurnax merely teaching the Nords in how to shout. Other races should be able to if they're teached, as shouting is just another form of magic.