LINGUISTIC ISSUES
The Thyatian language seems to be either Latin (Anaxibius) or Italian (di Malapietra), which are obviously closely related as both are derived from the same base Latin language. Now, given that the Hattians are part of the same group of peoples the Thyatians are from, it would seem that their languages would be similar.
Yet the Hattians seem to have a distinctly German language, much different from that of the Thyatians. So, how did the Hattians, who aren’t separated (geographically speaking) that far from the other Thyatians, develop this language on their own?
Indeed, this mystery is much simpler than it seems. Thyatians, Kerendans and Hattians were in their origins Antalian tribes that Nithians moved from the Heldann-Northern Reaches area to Davania in order to establish there new colonies. Unfortunately for them, they revolted and drove off their masters, and then thrived in the forests and plains of Davania, becoming the ancestors of the Hinterlanders.
Then, around 1.000 BC, the gnolls invaded Traldar and King Milen fled south to Davania, where after his death a great warleader founded the Empire of Milenia. The Milenians developed a new way of writing and a new tongue, resulted from the influence of the other Neathar and Oltec tribes with which they mingled, and thus the Milenian (Greek) was born. The Milenians then conquered and enslaved the surrounding populations, influencing heavily their culture and language. At this time (600 BC ca.), the Kerendans, Thyatians and Hattians migrated northward to avoid the complete submission to Milenians, and arrived in modern day Thyatis.
Thyatians and Kerendans had been strongly influenced by Milenian-Greek culture, and so they developed a new language and culture based 10% on their old Antalian ancestry and 80% on the Milenian culture, resulting in the Thyatian-Latin language and culture. Then, as the centuries passed, Kerendans developed their own language based on 2 distinct ethnic groups, the Kerendans (Italians, as Italian is the result of the mixture of Latin and Italic dialects) and the Ispans (Spanish, very much similar to Italian and Latin).
What about the Hattians, then? Simply, they remained very attached to the old ways of the Antalians and their dialect and culture is a close reflection of this: it is not Antalian since it was influenced by Thyatian and Milenian, but it is very much similar (the same difference between High German and Low German, or maybe between German and Danish).
The Traladaran language is an odd mix... part Romanian, part Slavic (southern), with a dash of Russian thrown in. I’ve divided the Traladaran language into two primary dialects... Volagan is the southern dialect of the coastal and lower riverine clans, while Voldavian is the dialect of the mountain, hill and deep forest clans. Volagan is more Romanian in form, while Voldavian is more Slavic (Serbo-Croatian). Volagan in written with the Thyatian alphabet ("Roman" script), and Voldavian is written in the Vergan alphabet (Cyrillic). The Boldavian language of Glantri is a Voldavian dialect with strong admixture of "Russian", and uses the Vergan alphabet.
Viseri is the name I gave to the Traladarans of the Savage Coast City States: they speak Viseri, which is a language related to Volagan, with a heavy admixture of Thyatian and Hulean (no real world equivalent; maybe Montenegran dialect, and uses the Thyatian alphabet [Viseri is also known as "Slag", and is the CommonTongue along the Savage Coast].
The language of the Karameikan Nobility is, of course, Thyatian, with strong admixtures of the Kerendan and Hattian dialects (the friends and family of Duke Stefan were primarly Kerendans and Hattians). There is, as yet, no seperate "Karameikan" language, though in and around Specularum there is a developing patois, a mix of Thyatian and Traladaran that is not yet a language, merely a series of codes in common use for trade between Thyatians and Traladarans...