Spelljammer
Language Aerdi
The most commonly spoken language of the World of Greyhawk. It uses the Oeridian alphabet.

The most widespread tongue in the Flanaess. Is still considered the dominant language of the North Kingdom, Ahlissa, the Solnor Compact, the Sea Barons, the Pale, the Urnst states, Ratik, the Iron League (Onnwal, Sunndi, and Irongate), the Lordship of the Isles, the Bandit Kingdoms, and Nyrond