Rather confusingly, the written form of the Chinese language is the same in Hong Kong and Taiwan (Traditional Chinese), although the lingua franca of Hong Kong is Cantonese, and that of Taiwan is Putonghua (or another dialect, Hokkien).
Mainland China uses spoken Putonghua for business, with the written form being Simplified Chinese.
Text in either form of Chinese takes a little over half the space of the equivalent English translation at a comparable text size.