Some people will use the term castellano as a way to refer to Spanish, as spoken in Spain, as opposed to 'español de España". They probably aren't looking too d

Some people will use the term castellano as a way to refer to Spanish, as spoken in Spain, as opposed to 'español de España". They probably aren't looking too deeply into the differences between speakers in Spain though, as when one compares a speaker from, say, Asturias, who will probably never use half of the past tenses, and might even use an even more irregular version of ser, vs someone from different parts of Andalucia, where you could cut the /s/ sound, or the /c/ sound, or the /z/ sound, or even multiples. Ultimately the fun part of talking about languages is that no matter how much one person might believe that their terms are clear and unambiguous, if the community of speakers is large enough, you are bound to find competing meanings either way.