Asked in Grammar, Sentence and Word Structure, Pronouns
Is it grammatically correct to say it is scissors?
No, it is not. The word "scissors" is a noun (and although it ends in an S, it is singular); in the sentence you are asking about, it would need an article. There are two ways to do this: if you are pointing it out by name, you would say, "It is a scissors." (It's not a rock, nor a tree, nor a knife. It's a scissors-- that's what it is called.) But if you are differentiating one pair of scissors...
Should you say translation into Portuguese or translation to Portuguese?
you should say "translation into" another language.