Do they speak English in Hong Kong?
Hong Kong is a former British colony, although the primary language is Cantonese. While English is a secondary language, most business owners and shopkeepers probably speak more English than you do Cantonese, so you’ll be fine. In Hong Kong Disneyland, many of the staff are bilingual (and some are even multi-lingual, with Putonghua being a tertiary language), so you should have no problems whatsoever.