I’m going to take a night school course to either learn mandarin or Cantonese and I plan to learn only one. The thing is that most of my family speaks cantonese and I can never understand them when they talk expect for random words so I kinda want to learn to talk to them eventually. But outside of my family most people I know speak Mandarin and don’t know cantonese. I don’t want to learn a language and never use it so which one should I take?