It's interesting to note, as well, that everyone seems to be able to communicate with the beast tribes as well, as evidenced by the existence of Little Solace, among other NPCs having direct relationships with the beast tribes. If I remember correctly, in 1.0, beastmen speaking the common tongue was a rarity (and Spoken learning beast tribe languages was even more rare), and that's why you, having the Echo, were special. You could be a liaison where others could not. Now, having the Echo just seems to make you a Primal killer.

I have a feeling they ret-conned the languages part of the Echo for ARR and just made one unified Common that everyone knows and can speak at least on some level.