Romain has played in all age grade levels for France, having represented the U18s, U19s and U20s. It was when playing for the U20s in the 2009 Six Nations Under 20s Championship when he first caught the eye of Perpignan selectors. Haven performed well for Perpignan in 2010, he was selected for the 2010 IRB Junior World Championship, playing in 3 matches - against Ireland and Argentina twice. He was one of five try scorers in the 5th place play-off, whom was won by France 37–23.