Rufus Latina

Rufus Latina is the language that a lot of the doggie magic related things are written in.

Latina translates to latin and Rufus may either translate to 'bark', 'dog' or 'ancient'.

Where it can be seen
The Ruf Bon Dufus:

the title - Ruf Bon Dufus The opening passage - Porus bon Trio

The symbol - trio bon ruf

Known words
Trio - Three Bon - Book, Of, [The] Ruf - possibly Ruff dufus - most likely Magic Porus - Power