Complex sentence: Importantly, this East Coast Latino ethnolect is a native variety of English and not a form of Spanglish, broken English, or interlanguage; it is not spoken by all Latinos in this region nor necessarily spoken only by Latinos.
Split into simpler sentences: Importantly, this East Coast Latino ethnolect is a native variety of English and not a form of Spanglish, broken English, or interlanguage. It is not spoken by all Latinos in this region, and it is not spoken only by Latinos.