Common Tongue

The Common Language (AKA: Trade Tongue) is a language spoken by almost everyone. It fell in use because of the need of a lingua franca. There is no commonly accepted origin of Common, and many claim the language is theirs.

WHERE IS IT AN OFFICIAL LANGUAGE?
As the main language
Vel Anir
Cerak At'Thul
Elbion
Alliria / Allir Reach
As a side language
Bathairk