Dutch, Nederlands, is the combination of many dialects together, the dialects of the several lower 'count(r)ies', that together formed the Netherlands. Used in the 'Statenvertaling', the major dutch bible translation. That's where the language becomes an official language. With the translation of the bible. And the dialects/languages it is made of are more than only the Lower West German dialects.
Thanks for the quote. Sounds beautiful