Prose
The word "prose" first appears in English in the 14th century. It is derived from the Old French "prose", which in turn originates in the Latin expression "prosa oratio" (literally, straightforward or direct speech).
Romance (love)
The word "romance" comes from the French vernacular where initially it indicated a verse narrative. The word was originally an adverb of Latin origin, "romanicus," meaning "of the Roman style". European medieval vernacular tales, epics, and ballads generally dealt with chivalric adventure, not bringing in the concept of love until late into the seventeenth century.