Changing french door opening right to left?

Yes this is poss the centre mulliion would have to be swapped to other door, which is made easier if both doors have handles if not two sets of handles would need to be purchased and possibly a new lock set as well.

Pretty unlikely that you can just reverse the doors due to the frame itself having it's mouldings and cills placed for the current configuration. It is possible, however, that you may be able to completely remove frame (remove the doors first) and reverse it into the existing gap before rehanging the doors. This, however, is likely to have an adverse effect on the current decoration surrounding it. A picture of what you've got would help.

It is doable but you need to know what your doing , not the easiest thing to do