Nanaille, I work for British Airways f company and am in posession of Baccalaureat TEchnologique STL which is accepted as A level equivalents, no need to revalidate them as it would be illegal for a company not to accept these documents being in the EU. Revalidating or getting recognition is just a waste of time or money, a french bac is just as good as an italian one, or spanish one, or english a lev, that's one of the beautys of the European Union.
Hope this helped.
All the best