Ok so I translated everything:
The first room after the herb says:
"Sun god temple"
The room with the fireballs says:
"He sits atop"
The room with the dead bodies says:
"A throne of fire"
The boss room says:
"Lord Helion"
And at the ending (SPOILERS, secret ending coming up):
"You've conquered the burning one. You are destined to rule the everlasting flame. When it is time, I will come for you. Be ready."
You're welcome!