I think you may misunderstand what the right to be forgotten usually refers to. It's not about a user's "data" such as emails or online comments; it's usually about news articles that mention a person.

Surely you would agree that no matter what French law is, there is no way a French judge should be able to force, say, an American company to not display links to American websites (which happen to mention a French person) for American users?

(disclosure: I work for Google, but not on anything related to RTBF, and my views are my own)