I-isiCastilian (Castellano) okanye IsiSpanish (español) lulwimi Romance kwiqela Ibero-Romance ukuba bavela iziyelelane eziliqela Latin oluthethwa emntla wombindi Iberia ehlabathini ngenkulungwane yesithoba. saa ngcembe nokwandiswa loBukumkani Castile (langoku kumntla Spain) ukuya kumbindi nakumzantsi saseIberia ngamaXesha Aphakathi.