 March was one of the first poets to use the local vernacular, Valencian, instead of the troubadour language, Occitan.His poems are marked by obscurity, a sometimes monotonous morbidity, and a conflicting battle between desire and morality, achieved at its apex in the great "Cant Spiritual".He was fully entitled to the supremacy which he enjoyed among his contemporaries, and the success of his innovation no doubt encouraged Boscán to introduce the Italian metres into Castilian.