Hello! I’m a Mandarin learner from Brazil (very much a beginner). I know how to write some ideograms, how to say some everyday things, etc.

Close to my home there is a small market with Chinese workers. I’m not sure if they’re speaking Mandarin or Cantonese, but I wanted to know if it’s rude to say a “hello, are you speaking Chinese?” cause I wanted to strike a conversation with them. I don’t want to be mean or sound like an nuisance to them.

谢谢！Thank you! Any more details you might want just let me know