Which country adopted roman Catholicism first Spain or France?

Spain adopted Roman Catholicism first, as it became the official religion of the Iberian Peninsula following the Visigothic conversion in the early 6th century. France, while also deeply influenced by Roman Catholicism, experienced its significant spread later, especially after the Frankish King Clovis I converted in the late 5th century. However, Spain's official alignment with Catholicism predates France's.