Unther

Unther, like its long-standing enemy, Mulhorand, was once a great empire, but now seems to be in decline. The magocratic country is ruled by the Northern Wizards from the capital of Messemprar, since the former capital of Unthalass is occupied by Mulhorandi forces..

The city of Shussel host as Shou Town (source)

Navy and seafaring
Vessels from Unther are named after sea creatures or sea-related myths.

AD&D Information
"The language of Unther is called Untheric. It belongs to the same language family as the language of Mulhorand, but it so greatly changed over the course of many centuries that there are now very few similarities between the two languages. The runes used by the Untheri are entirely different from those used by the Mulhorandi; these runes pre-date their migration from Raurin. Early Untheric writing consisted of syllabic hieroglyphs (runes that represent one syllable, as opposed to the hieroglyphs of Mulhorand, which represent one word) and seems to have had at least minor influence on the alphabet of Thorass (Old Common)."