Does the prohibition against following a fard (obligatory) prayer with a nafila (supererogatory) prayer without changing one's place or speaking also apply to following a nafila prayer with another nafila prayer?

It is recommended to separate the obligatory prayer (fard) from the supererogatory prayer (nafilah) by speaking or moving from the spot, because the Prophet, peace and blessings be upon him, forbade connecting one prayer to another until the worshipper speaks or leaves. The wisdom behind this is to distinguish between the obligatory and other prayers, and to multiply the places of prostration which will bear witness for the worshipper on the Day of Resurrection.