 Linguists typically date this transition to around the 5th century.Old Dutch is divided into Old West Low Franconian and Old East Low Franconian (Limburgian); however, these varieties are very closely related, the divergence being that the latter shares more traits with neighboring historical forms of Central Franconian dialects such as Ripuarian and Moselle Franconian.While both forms of Low Franconian were instrumental to the framing of Middle Dutch, Old East Low Franconian did not contribute much to Standard Dutch, which is based on the consolidated dialects of Holland and Brabant.