All Chinese languages are written using the same characters so that texts can be understood in all parts of the country. It’s the spoken languages that differ. There are many Sinitic languages spoken in China that differ significantly from each other.
The most widely spoken language is Mandarin, followed by Wu and Cantonese. The Cantonese language is spoken by approximately 100 million people worldwide, and Mandarin is spoken by approximately 800 million. The homeland of Cantonese is Canton (Guangdong), Hong Kong, and Macao.
Chinese-speaking people in the USA, Great Britain, and Australia predominantly speak Cantonese. This also applies to the Chinese who have migrated to Malaysia, Vietnam, and Singapore, and translations into and from Cantonese are especially important for the economic sector.