No, it has nothing to do with accent (phonetic). It's entirely language. They have a long history of "forbidding" words that are "real or not real spanish".
And by the way, counterintuitively, languages have NOT evolved to be better understood, but on the contrary, to "separate" or create cohesion in smaller groups.
And by the way, counterintuitively, languages have NOT evolved to be better understood, but on the contrary, to "separate" or create cohesion in smaller groups.