Markus,
Your invitation is welcome and has been received warmly. However, we have not yet found Agarthia in our explorations, so it would be a challenge, to say the least, for us to send an ambassadorial staff to reside there.
In addition, what diplomatic talent my nation does possess, is currently embroiled in intensive negotiations with one of our neighbors. We feel peace is very near, and once the treaty is ratified by both nations, we shall eagerly look forward to expanding our diplomatic breadth to include Agarthia. Once we find your country, that is.

Best wishes from the frigid south!
Vali Hopewell