I've rejected the proposal [1] for "Creole Spanish". The proposed code "crp" is a valid ISO 639-5, not ISO 639-3 code. It's not even a "macrolanguage", but a group of languages.
[1] https://meta.wikimedia.org/wiki/Requests_for_new_languages/Wikipedia_Creole_... [2] http://www-01.sil.org/iso639-3/documentation.asp?id=crp