http://www.jstor.org/stable/3653092
The Mystery of the Einstein-Poincaré Connection
Olivier Darrigol: "It is clear from the context that Poincaré meant
here to apply the postulate [of constancy of the speed of light] only
in an ether-bound frame, in which case he could indeed state that it
had been "accepted by everybody." In 1900 and in later writings he
defined the apparent time of a moving observer in such a way that the
velocity of light measured by this observer would be the same as if he
were at rest (with respect to the ether). This does not mean, however,
that he meant the postulate to apply in any inertial frame. From his
point of view, the true velocity of light in a moving frame was not a
constant but was given by the Galilean law of addition of velocities."

Olivier Darrigol,

Have you tried to discuss this in France? Never? It would be useless?
French physicists and philosophers of science couldn't care less?

Pentcho Valev