San Jorge may or may not turn out to be French. The mere claiming of it, without previous agreement on spheres of influence, is insufficient. It is actually closer to San Domingo or Barbados.
If Spain were to take it on her turn, England would accept it. England might very well take it on hers.
The French King is advised to be less belligerent in his public announcements (eg to the Dutch just now), if he expects the valid concerns of his nation to be respected in Europe....