I'm fluent in English, Mandarin, Cantonese and Hokkien.
English and Mandarin are both taught as first languages in my country.
Cantonese is my mother tongue and what I use with my family, plus I lived in Hong Kong for 5 years.
Hokkien I picked up off the streets, it's a common dialect where I live.
I also studied French as a third language for 5 years, although my French is almost completely forgotten. Don't use a language and you'll lose it.
I know a smattering of various other Chinese dialects as well, like Teochew, Hainanese (I'm half Hainanese), Hakka.