Ok, every Wizard school and Priest Sphere has it's own characteristics: tones, words, symbols, runes, gestures. These characteristics make up the 'language' of that school or sphere. In order to learn, cast, and research spells of particular level, the caster must be proficient at the language of the spell, at the level required. A fourth level Charm spell requires fourth level knowledge of language of Enchantment/Charm.
Access to a particular language is restricted by the gods. In technical terms, you must spend character points to gain access. A language which you have spent character points for, but have not been trained in, is considered to be Level 0.
The number of languages of each spell level a caster can know is limited by his "casting level." For wizards and priests, this is their character level, for bards, it is level -1. The language abilities is summed in the following table: (use the school or sphere column depending on if you cast from Wizard schools or Priest spheres.)
| Caster Level |
Spell Level | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| School Languages | Sphere Languages | |||||||||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |||
| 1 | 2 | 2 | ||||||||||||||||
| 2 | 4 | 5 | ||||||||||||||||
| 3 | 4 | 2 | 5 | 2 | ||||||||||||||
| 4 | 6 | 4 | 7 | 5 | ||||||||||||||
| 5 | 8 | 4 | 2 | 7 | 7 | 2 | ||||||||||||
| 6 | 8 | 4 | 4 | 7 | 7 | 5 | ||||||||||||
| 7 | 8 | 6 | 4 | 2 | 7 | 7 | 5 | 2 | ||||||||||
| 8 | 8 | 6 | 6 | 4 | 7 | 7 | 7 | 5 | ||||||||||
| 9 | 8 | 6 | 6 | 4 | 2 | 10 | 10 | 7 | 5 | 2 | ||||||||
| 10 | 8 | 8 | 6 | 4 | 4 | 10 | 10 | 7 | 7 | 5 | ||||||||
| 11 | 8 | 8 | 8 | 6 | 6 | 12 | 10 | 10 | 7 | 5 | 2 | |||||||
| 12 | 8 | 8 | 8 | 8 | 8 | 2 | 15 | 12 | 12 | 7 | 5 | 5 | ||||||
| 13 | 10 | 10 | 10 | 8 | 8 | 4 | 15 | 15 | 15 | 10 | 5 | 5 | ||||||
| 14 | 10 | 10 | 10 | 8 | 8 | 4 | 2 | 15 | 15 | 15 | 12 | 7 | 5 | 2 | ||||
| 15 | 10 | 10 | 10 | 10 | 10 | 4 | 2 | 15 | 15 | 15 | 15 | 10 | 5 | 2 | ||||
| 16 | 10 | 10 | 10 | 10 | 10 | 6 | 4 | 2 | 17 | 17 | 17 | 15 | 10 | 7 | 2 | |||
| 17 | 10 | 10 | 10 | 10 | 10 | 6 | 6 | 4 | 17 | 17 | 17 | 17 | 12 | 7 | 5 | |||
| 18 | 10 | 10 | 10 | 10 | 10 | 6 | 6 | 4 | 2 | 20 | 20 | 20 | 20 | 15 | 10 | 5 | ||
| 19 | 10 | 10 | 10 | 10 | 10 | 6 | 6 | 6 | 2 | 22 | 22 | 20 | 20 | 15 | 10 | 5 | ||
| 20 | 10 | 10 | 10 | 10 | 10 | 8 | 6 | 6 | 4 | 22 | 22 | 22 | 20 | 17 | 12 | 5 | ||