Since Cantonese is the main language spoken in Hong Kong, learning it can be essential for daily life and getting by. That said, knowing Cantonese will certainly make your stay in Hong Kong more enjoyable and immersive.
If you are considering staying in or doing business with Mainland China, Mandarin would be a more suitable choice, as it is the official language there. For your information, Mandarin is referred to as “Putonghua” in Chinese. “Putong” means “common,” and “hua” means “language,” so Putonghua literally translates to the “common language” of Mainland China.
Cantonese and Mandarin are related but distinct languages. Mandarin is the official language of Mainland China, while Cantonese is the primary dialect spoken in Hong Kong. In terms of written Chinese, the grammatical structure used in formal writing in Hong Kong is the same as that used in Beijing. However, Hong Kong uses traditional Chinese characters, whereas simplified characters are used in Mainland China.
When it comes to spoken language, Cantonese and Mandarin differ significantly in grammatical structure, vocabulary, and pronunciation. While most people in Hong Kong can understand Mandarin fairly well, they may not speak it fluently without proper training.