How would you explain the difference between left wing and right wing to people with different political systems?

I assume you mean the left and right in the US? That’s simple:

So, in the US their left wing is our right wing and their right wing are the xenophobes all normal people hate and the illegal parties – yes, those that are unconstitutional and use religion to justify their policies – you know, the ones no one would ever vote for, the ones which say abortion should be illegal, that women are second class citizens, the racists, the anti-immigrantion ones, the ones that like Putin etc.. The end.