but English is a living example of a language that includes parts of all European languages, plus Asian, African, Australian Aboriginal, and North and South American native cultures as well
That is all very well, and your summary is interesting and well-written, but please understand that each and every European language could claim the same. There are Latin, Greek, German, French, English, Russian, Italian, Czech, etc etc borrowings in Polish... plus borrowings from faraway cultures such as karibu, amok, kajak, harakiri, nirwana, joga, etc.