There is nothing wrong with your English!

In a cartoon you might see, $#%&! (or something like that) in the place of a 'swear' word. In America it would be called 'cussing' I think....so, 'rude words'. When we, ignorant people, who generally speak only one language, see another language it may as well be 'swear' words to us - hence the joke. You're all good my friend. And yes, in New Zealand, people will also ask if they can help you - and not just if you're a pretty girl.

Welcome!