The sosei-shita living in the Rim have, over the last century and change, gained a great deal of experience. They know what a pterosaur is, for one. They've also learned the local people's language (if one can call it that). Thanks to their help of their Conduit ally, they also know what a speaker is, as well the character of its voice and how one might identify it as distinct from natural sounds.
In all that time, they have not previously seen a pterosaur, carrying a speaker, blaring warnings about oncoming...earthquakes and tsunamis, is their best guess. They're not entirely certain what to do about it.
About a day later, their ally and his closest companion return from their excursion to World Thirteen and the meeting with the other Conduit. After the cursory waiting time for their ally's world-auras to calm down (and for the handful of disturbing frog-like monstrosities that appeared alongside them to be slain by the fort's garrison), they enter into the fort, their ally distributing out his customary gift of color-flame(relatively small since he'd visited quite recently to drop off his car and make the two bicycles that he and Sunaipaa were riding at the moment). During the gift-giving, they give him the news since his last appearance, and he immediately suspects the involvement of another Conduit, and likely one well-attuned to the Rim (at least compared to himself). Information from his Stone Library confirms the likelihood of this, given the absence of giving such non-geographical names to places or areas in the baseline natives. Information from the same source indicates that information being provided is likely accurate as well.
This, in turn, demands attention. A team is put together, naturally including their ally, and among the vehicles currently housed in the fort's garage, a recently refitted ATV is chosen as the most appropriate vehicle. The team is dispatched westward, while those remaining at the fort begin preparing for an earthquake (something which, having experienced many times in the past several decades, they are fortunately well-prepared for).
This is likely furthest journey into the west any of them have been on, since they're bound for this alleged 'Word-Seeing Land', which none of them have seen any evidence of previously. This team is the most skilled wilderness survival experts and experienced explorers, and with their ally in the group as well, access to additional supplies of orichalcum, color-flame, edible food, and potable water is never far away. It takes them time, and occasionally searching for and finding additional speaker-equipped pterosaurs to make sure they're still headed in the right direction and haven't passed the territory by, but they're all but certain to find the Word-Seeing Land eventually.
What do they find, as they come upon its outermost border?