Site settings
One choice for the whole site, kept in this browser — not on the account. A switch takes effect at once, on the page you are on.
Appearance
Cache
Throws away what this browser keeps of the site — downloaded models, textures and icons, and the choices remembered here (the theme, the graphics). You stay signed in. The page loads again afterwards; the 3D comes back as it is needed.
Language
Only the interface is translated; item, skill and monster names stay as the game shows them, so they can be found.