As the term "creole" is used in linguistics, it means a language that: a) started as a contact language, and b) has become the mother tongue of a group. So, I t

As the term "creole" is used in linguistics, it means a language that: a) started as a contact language, and b) has become the mother tongue of a group. So, I think you might be right, because Spanglish originated as a speech among English-Spanish bilinguals rather than as a contact language between English and Spanish communities. If Spanglish became the mother tongue of a group who couldn't speak Spanish or English, then, well...I'm not sure.