While Cantonese is spoken in other areas like Guangdong province in mainland China, Macau, and some overseas Chinese communities, Hong Kong is the place where it holds the status of the official language.
It's important to note that:
* Cantonese is not a "country" language. It's a dialect of Chinese spoken in various regions.
* "Country" doesn't necessarily imply the largest number of speakers. For example, Mandarin Chinese has a larger global population than Cantonese.
Therefore, while Cantonese is spoken in many places, Hong Kong is the country where it is most dominant.