Southern magic

Southern magic was a term used to describe unique spells written in a different magical language.

Origins
As the named implied, southern magic originated in south Faerûn, specifically Halruaa. [{Wizard]]s who were not native Halruaans could not read spells or scrolls written in the southern magic language, even through the use of a read magic spell.

Rumors and Legends
In the mid 1360's DR, the brilliant wizard Random Riellor successfully created a spell that allowed non-Halruaans to decipher a spell written in southern magic. This spell was called read southern magic.