The core Languages of the East Asian Cultural Sphere generally include the varieties of Chinese, Japanese, Korean, and Vietnamese. All of these languages have a well-documented history of having historically used Chinese characters, Japanese, Korean, and Vietnamese all having roughly 60% of their vocabulary stemming from Chinese. There is a small set of minor languages that are comparable to the core East Asian languages such as Zhuang and Hmong-Mien. They are often overlooked since neither have their own country or heavily export their culture, but Zhuang has been written in hanzi inspired characters called Sawndip for over 1000 years. Hmong, while having supposedly lacked a writing system until modern history, is also suggested to have a similar percentage of Chinese loans to the core CJKV languages as well.