The term "eragon" likely refers to the fantasy novel series "Eragon" by Christopher Paolini.
Within the fictional world of Eragon, there are multiple languages:
* Ancient Language: The language of the dragons, which also holds powerful magic.
* Common Tongue: The language spoken by humans in the world of Alagaësia.
* Dwarf Language: The language spoken by the dwarves.
* Elf Language: The language spoken by the elves.
If you are looking for information about a specific language in the Eragon books, please specify which one and I can provide you with more details.