Melenchon interrupted Le Pen as she was calling for boosted French - language teaching .
Socialist candidate Benoit Hamon and far - left leader Jean - Luc Melenchon , both looking to boost their poll numbers , were the first to take swipes at Le Pen .
leader interrupted Le Pen as Jean - Luc Melenchon was calling for boosted French - language teaching .
Socialist candidate Benoit Hamon and far - left leader Jean - Luc Melenchon , both looking to boost their poll numbers , were the first to take swipes at Le Pen .