Cantonese Chinese has 9 tones, yes, a full 9 tones, which makes it much harder to learn than Mandarin. Now that HK has reverted back to Chinese rule, Mandarin is spoken much more there, but the main language is still Cantonese. English is spoken almost everywhere, but for fun, here are a few basic phrases to get you started:
How are you? Nei hoe ma?, Very good! Hoe hoeI , please mm goi Please speak English mm goi gong ying mun , I don't understand ngau mm ming. Thank you-for doing something mm goi, same as please, Thank you-for a gift do jie, I would like to go ____ ngau seung heui____, I would like to have ___ ngau seung yiu___, You've got style! nei hoe yau ying!, Tastes good hoe hoe sik, Hong Kong is very beautiful Heung Gong hoe leng
OK, hope this gets you started. If this does not make any sense, feel free to email me! Have fun.