
The naming conventions post features actual Japanese characters and translations of their meanings.
The way I see it you couldn't have a very detailed and robust naming system that has a base in a solidly well defined and understood foreign language and ALSO have that language be completely dead in daily use.
But no, we don't have anything to go on that suggests Domans speak anything but whatever Eozean's speak other that what we've extrapolated about the WoL. There's nothing that directly states they speak Doman.
The way I see it you couldn't have a very detailed and robust naming system that has a base in a solidly well defined and understood foreign language and ALSO have that language be completely dead in daily use.
But no, we don't have anything to go on that suggests Domans speak anything but whatever Eozean's speak other that what we've extrapolated about the WoL. There's nothing that directly states they speak Doman.