In 4-4, Nailah tells Ike that the simpler modern language was made because it was difficult for the laguz to learn the ancient tongue. However, the laguz who lived long (like the herons and dragons) had all the time in the world to learn it.
So...does this mean the laguz are slower than the beorc? Or at least back then, they were? Or maybe they just have a differently working mind...I kinda doubt they'd be less smart or slower than beorc though, since Naesala is sharp as a tack. Ranulf also seems to be quite witty.
Thoughts?