OOC:
the basic on languages is that during the Dawn Age all the people spoke 1 language. There were 3 written languages. The base simple script, which most people can read at least a little, arcane has influence from the immortals from other realms, and divine which was considered the most pure.
The Shattering alerted people's memories and created the modern languages, similar the the tower of babble. These new languages share many words from their common origin, about 25%, so many are almost like different dialects with they have very different pronunciation and accents.
After the Shattering all but priests, clerics, and mages, lost knowledge of the ancient high script and most civilized races developed a new high script
Rx Fey speak gaelic but understand ancient English from before the Renaissance and most others speak common which is more like a English with multiple accents based on race and region.