Tataru Zu Hestui:
Unfortunately, the language of flame cannot be explained, nor taught with common language. I cannot teach you the language, but I can tell you how to learn it.
To learn the language of flame, you must meet the Hestui Totem Spirit. The spirit is a divine being, symbolizing dignity and wisdom, taking the form of a kasha bear.
However, to meet it you must prepare a few things. Find and bring me the kasha bear pelt and kasha bladespider husk, and hunt the scarlet salamander and find the fiery egg.