hebrew - How holy is Aramaic?

I've always thought that Hebrew is the Lashon HaKodesh, the language G-d speaks, and the language of Judaism. And that Aramaic is also important but somewhat secondary.

But based on this answer, it seems that Aramaic may be as important as hebrew (or even more). How could Aramaic be the first language spoken? What's the importance of Aramaic in Judaism and how does it compare to Hebrew?