Hangul effectively replaced Hanja only in the 20th century. Since June 1949, Hanja have not officially been used in North Korea, and, in addition, most texts are now most commonly written horizontally instead of vertically. Many words borrowed from Chinese have also been replaced in the North with native Korean words. Nevertheless, a large number of Chinese-borrowed words are still widely used in the North (although written in Hangul), and Hanja still appear in special contexts, such as recent North Korean dictionaries. The replacement has been less total in South Korea where, although usage has declined over time, some Hanja remain in common usage in some contexts.