Btw, in the spirit of the title of this thread, in English you would say "as a French person". In the past, "Frenchman" was used but it's understandably out of favour these days.
"French" can be used as an adjective but not a noun in this context. It's a very common error, I suppose since "français" can be used as an adjective or a noun en français :)
That is wrong. The demonym for a person from France is "French". It only sounds wrong to an English ear because we're so used to calling them Frenchmen, but it's chauvinism on our part, not a linguistic mistake on theirs.
That should also be introduced when teachers explain hexadecimal :-)