These are bit flags. So combininig them with bitwise OR will allow multiple languages for a character.
For example the value 0x03 (which is 0x01 OR 0x02) would mean that the character speaks the human language and the elfish language.
| Value | Name |
|---|---|
| 0x00 | No language |
| 0x01 | Human |
| 0x02 | Elfish |
| 0x04 | Dwarfish |
| 0x08 | Gnomish |
| 0x10 | Sylphic |
| 0x20 | Felinic |
| 0x40 | Morag |
| 0x80 | Animal |