Is the English language a creole language, a formalized French-like language with a Germanic substrate? Okay, maybe not 21th century English, but perhaps its direct ancestor, Middle English? Look at it, it evolved from a Dutch-like Germanic language called "Anglo-Saxon" but after the Norman invasion, the ruling and educated class spoke French while the masses continued to speak Anglo-Saxon. As time went on, Germanic words were gradually displaced by French vocabulary, starting with the educated words, and gradually trickling down to more everyday terms. Now, English vocabulary is 25%-80% French-based, the proportion based on how formal and technical the language used is (this includes French words evolved from Latin, many of which are themselves derived from Greek. This also includes words invented by English that were designed to match French morphology). What other languages have such a high proportion of another language's words in their lexicon, not including words that evolved separately in the two languages prior to contact? (e.g. English "I" and French "je" are related, but don't count as loaned words since they arose from a common ancestor. Nor are Spanish "mandar" and Portuguese "mandar".) Perhaps Japanese with Middle Chinese, or Urdu with Persian? Would you consider English, or at least Middle English a creole?