Alduin started to talk to me.. Freaked me out, but I want to know what he was saying.

Alduin: Sahloknir! Zill gro dovah ulse!

Sahloknir: Alduin, thuri! Boaan tiid vokriiha sulyksejun kruziik?

Alduin: Geh, Sahloknir, kaali mir.
Ful, losie Dovahkiin? Zu’u koraava nid nol dov do hi.
Sahloknir, krii daar joorre.

Me: Eh..Dovahkiin? o.o?

http://www.uesp.net/wiki/Lore:Dragon_Language

Alduin: Sahloknir! Get your tired dragon butt out of there!

Sahloknir: Alduin, sheesh! Can't you give me a break?

Alduin: No, Sahloknir, lazy git.
That Loser Dovahkiin? He's running around pretending he's a dragon.
Sahloknir, commence noogies.

Alduin: Sahloknir (Phantom Sky Hunt)! (Zill) (gro) dragon (ulse)!

Sahloknir: Alduin, (overlord something, maybe 'my lord'?)! (Boaan) time ('day of king'?) ancient?

Alduin: Yes, Sahloknir, (champion?) allegiance.
So, (this is?) Dovahkiin? (Zu'u) (koraava) no from wyrm of/about (hi).
Sahloknir, kill this/these mortals.

best translation i can give you. the last bit is the important part though. not that you need a translation to understand it.

Lingrah krosis saraam strundu’ul, voth nid balaan klov praan nau.
Long has the Stormcrown languished, with no worthy brow to sit upon

Thu’umu, mu ofan nii nu, dovahkiin, naal suleyk do kaan, naal suleyk do shor, ahrk naal suleyk do Atmorasewuth
By our breath we bestow it now to you in the name of Kyne, in the name of Shor, and in the name of Atmora of old

Meyz nu ysmir, dovahsebrom, dahmaan daar rok
You are ysmir now, the dragon of the north hearken to it

Thats what the Greybeards told me, and when I tried to use the link given to me in the first reply, it was off.