Languages Smaug spoke?

[Zigûr]

Originally Posted by Inziladun

Smaug could easily have known some Elvish Speech too though, at least some Sindarin.

I agree. It seems highly probable to me that an old and cunning creature like Smaug would know some Sindarin, given its comparable ubiquity to Westron.

It would be interesting to know if dragons had their own language. What language did the servants of Morgoth speak in the First Age? Presumably it was some corrupted version of Sindarin, Quenya (Morgoth appears to have spoken both of them) or perhaps of the Primitive Quendian spoken by the first Elves to become Orcs. I could imagine the Dragons of the North retaining vestiges of such language, as they appear to have been long-lived.