"I am not a child!"
Translation:Nie jestem dzieckiem!
Because 'nie' negates the word which follows it. 'Jestem nie dzieckiem' would mean 'It is not a child, who I am (but someone else)'
Why is "ja nie to dziecki" incorrect? Can to not be used with the nominative in an interrogatory sentence?
According to the Tips and Notes on this section, you can't use the "to + Nom" construction with pronouns.
Can you provide a link (or just the name of the section)? I can't seem to locate where it says that.