The Horatio use Pokémon Speak.
I mean, what other language would they use?
Most Standard Fantasy Settings are located in the Endless universe
Between Endless Space and Endless Legend, were already know there's not much distinction between magic and Dust-based science. Other fantasy worlds exist on this same plane, but lack treasure troves like the Husk of Knowledge to teach them about Dust and the Endless, so they remain completely ignorant that 'magic' and 'mana' are anything but what they appear to be. Other dimensions are known to exist in the Endless 'verse, so these help explain places like the Warp and the Fade. Events like the Conjunction of the Spheres are caused by wormholes and portals.