How to describe Brazilian accents in English?

Heey!!

So, a friend of mine was explaining to me the diferences between some accents in USA. Then she asked the diferences between Brazilian accents, and I need help to explain that in English.

For example, I was thinking about how cariocas usually use "x" instead of "s". (bixxcoito and not biscoito). But "x" in English words sometimes doesn't have the same sound as in Portuguese. (How would I explain this accent, or any other?)

P.S: I know that each state has a lot of different accents and we should not generalize. But it's just so my friend can have a vague idea about the diferences between the South and North accents, for example.

Thank you.