[sakaeyellow]

Let me clarify.

Chinese character:
Simplified-used in Mainland China
Traditional-used in Taiwan and Hong Kong

Spoken languages:
Mandarin-used as the official language in Mainland and Taiwan, but both places have dialects
Cantonese-used in Hong Kong, Macau and southern part of Guangdong Province.

So Hong Kong and Taiwan share the same traditional Chinese character in writing, but Mainland and Taiwan share the same spoken language.

And written Cantonese is a totally different story...