To give cultures and races a bit of individual character, their languages are based on real world (albeit in some cases no longer commonly used) languages for names
Brondheimian, Dwarvish = Norse
Darian, Ambrian = Anglosaxon
Irolan = Gothic
Elvish, High and Elvish, Dark = Quenya
Elvish, Common = Sindarin
Kartaran, High = Japanese
Kartaran, Common = Mandarin
Zylistani, High = Persian
Zylistani, Common = Yiddish
For further information see languages