Common languages:
- Solarian (Common)
- Dwarven
Uncommon languages
- Ancient Solarian (this is your gnomish/celestial)
- Elven (they are very few in number)
- Dragonborn (keep to themselves mostly)
- Druidic
- Runic (how magic is written. This is taught exclusively at the Karn’Dal academy)
Other languages:
Languages of other creatures are either unknown (no known teachers or extremely niche and handled on a case by case basis in terms of character creation)
I believe in keeping the language system fairly simple and more to the point. It would make sense for there to be racial languages for the dwarves, elves, dragonborn and gnomes since they are closely related to the two gods. Other people such as the Night Touched, humans, Tieflings and Pyreborn all speak common (Solarian)