> Their written form are all the same. Regional languages in China have separate writing system when you need to write what is actually spoken. https://en.wik

> Their written form are all the same. Regional languages in China have separate writing system when you need to write what is actually spoken. https://en.wikipedia.org/wiki/Written_Cantonese#Vocabulary https://en.wikipedia.org/wiki/Written_Cantonese#Vocabulary https://en.wikipedia.org/wiki/Fuzhou_dialect#Writing_system https://en.wikipedia.org/wiki/Fuzhou_dialect#Writing_system Easiest way to see this difference is watch the news in Cantonese -- it is mostly 书面语 (standard) mandarin but pronounced as Cantonese, whereas day-to-day spoken Cantonese is completely different in structure and vocabulary. What do you think gets written in HK movie scripts? Definitely not standard written mandarin.