I'm French and am looking for a book I read as a child. I think it's an American book (I read it translated in French). It's about a boy, probably in the early XXth century (or late XIXth), who is poor and starts by selling newspapers in the street. I think he then becomes a succesful journalist. The cover of the book, in France at least, was colorful and showed a boy holding newspapers in the street. Unfortunately, I don't remember much more than that. I'd say that the overall philosophy of the book was to promote a certain way of life to children, something like: "with a lot of courage and dedication, you can succeed, whatever your social origin is".
This sounds like a Horatio Alger book (although this type of rags-to-riches plot was fairly popular in the U.S. in the 19th century; Horatio Alger is the most famous of the authors who wrote these, so his books are probably more likely to have been translated.)
Dan, the Newsboy, also known as Dan, the Detective, is one of Alger's books where the hero starts out selling newspapers. If this isn't the book you remember, you will need to give us more information. It is out of copyright, and you can read it online here (in English, not French, unfortunately).