Pidgins, Creoles, and Lingua Francas
A pidgin is a simplified contact language that develops when speakers of mutually unintelligible languages need to communicate for a specific, usually limited, purpose, such as trade or plantation labor, and that by definition has no native speakers: everyone who uses a pidgin has learned it as a second language, alongside their own mother tongue. Pidgins typically draw most of their vocabulary from a single dominant, or "lexifier," language while radically simplifying grammar, reducing or eliminating verb conjugation, grammatical gender, and complex tense marking. A creole, by contrast, emerges when a pidgin, or a comparably reduced contact variety, becomes the first language of a new generation of speakers, a process linguists call nativization, during which the language's grammar typically expands and stabilizes to meet the full communicative demands of a native tongue. This pidgin-to-creole distinction, formalized by scholars such as Robert Hall in the mid-twentieth century, remains the standard definitional criterion in creole studies, even though real-world cases such as Hawaiian Creole English or Nigerian Pidgin show that the line between an expanded, stable pidgin and a fully nativized creole is not always sharp.
Why do you think there's historiographical debate about "Pidgins, Creoles, and Lingua Francas"?