Excellent source for Hyrkanian language

[JamesMishler]

http://laurencio.webz.cz/mongolxel/classical/

Good to get ideas for Hyrkanian names, personal, tribal, and otherwise. Plus, if you really go all-out on "flavor text," I'm sure you can hand-draw those Mongolian writing images for game hand-outs...

 

[Orkin]

If you equate Hyrkanian with Mongolian, which is not too far a leap. Mongolian isn't well-known enough for it to cause problems and misapprehensions.

The other languages are another matter. Aquilonian, anyone?