When a foldable is used in a half-folded state (like a book), + implementers might need to take into account the effect of + text direction and writing mode on the layout and presentation. + +
For example, right-to-left languages + (those that use scripts such as Arabic, Hebrew, Syriac, and others) + and many vertical writing modes used by, for example, East Asian languages + progress pages in the opposite order to that used by an English book, + with the lower numbered page on the right. +
+ See Chinese, + Japanese, + and Korean differences in writing modes for more information.