Ultraman

One of my friends came here (from HK) when he was still in early secondary school, now he's 3x and he has been working in Caucasian companies only. He still has some non-native accent la. I think besides studying, learning and from daily experience, also depends on your personality and how talented you are. Hehe....

Ultraman

Honestly, why bother to have any accent? But in fact, you should be glad and it's actually an advantage to speak bilingual (English and Cantonese, or English and Mandarin) or trilingual (English and both Cantonese and Mandarin) or even quad-lingual or more tim la! Which not many Caucasians are able to do that!