I do find it a little awkward that the only time we actually hear a foreign language being spoken is with the Ascians.

It is it noted that there's a common tongue used by most of the spoken (Beastmen included). It takes a little suspension of disbelief to accept that seemingly everyone happens to know this language, though, since while the Echo can allow one to understand one's words without knowing a language, I can't recall a single time where this was actually in play and someone present with us was bewildered by what someone was saying while we could understand it just fine.