In portuguese, it is ok to say “Não como nada.” But you cannot say “I don’t eat nothing” in English.
Here is a jingle (poem) we use to teach children not to use double negatives.
Don’t ever use NOT and NEVER together.
Don’t say, “We don’t never have fun” because you’ll be using two negatives and you need to be using just one.
You will always be in trouble in your negatives are double!
From Up, Up and Away: a Book About Adverbs by Ruth Heller.
Mary Ziller from USA