Do you really think the US government would allow French
laws to have any jurisdiction on US soil?
The fact that Alcatels headquarters is in Paris is irrelevant.
It's US law that's used. I used to work for the same (US)
company in both the UK and the US - and believe me, the
contract had quite some differences in both countries.
US based companies don't get away with giving their employees
of European offices only 10 or 15 days vacation a year - they
are subject to Europeans laws; just as European companies are
subject to US law for their USA based offices.
As for the "spirit" of those companies, don't forget the law
suit was stared when the company wasn't owned by Alcatel yet.
And don't get the impression that if Alcatel buys a company
everything is going to change instantly. That will take quite
some time, if ever.