A process of standardisation started in the Middle Ages, especially under the influence of the Burgundian Ducal Court in Dijon (Brussels after 1477).
The dialects of Flanders and Brabant were the most influential around this time.
The process of standardisation became much stronger at the start of the 16th century, mainly based on the urban dialect of Antwerp.
The 1585 fall of Antwerp to the Spanish army led to a flight to the northern Netherlands, where the Dutch Republic declared its independence from Spain.
This influenced the urban dialects of the province of County of Holland.
In 1637, a further important step was made towards a unified language, when the Statenvertaling, the first major Bible translation into Dutch, was created that people from all over the new republic could understand.
It used elements from various, even Dutch Low Saxon, dialects but was predominantly based on the urban dialects of Holland of post 16th century.

In the Southern Netherlands (now Belgium and Luxembourg), developments were different.
Under subsequent Spanish, Austrian and French rule, the standardisation of Dutch language came to a standstill.
The state, law, and increasingly education used French, yet more than half the Belgian population were speaking a variety of Dutch.
In the course of the nineteenth century the Flemish Movement stood up for the rights of Dutch speakers, mostly referred to as "Flemish".
However, the dialect variation was a serious disadvantage in the face of the standardised francophony.
Since standardisation is a lengthy process, Dutch-speaking Belgium associated itself with the standard language that had already developed in the Netherlands over the centuries.
Therefore, the situation in Belgium is essentially no different from that in the Netherlands, although there are recognisable differences in pronunciation, comparable to the pronunciation differences between standard British and standard American English.
In 1980 the Netherlands and Belgium concluded the Language Union Treaty.
This treaty lays down the principle that the two countries must gear their language policy to each other, among other things, for a common system of spelling.
A process of standardisation started in the Middle Ages, especially under the influence of the Burgundian Ducal Court in Dijon (Brussels after 1477). The dialects of Flanders and Brabant were the most influential around this time. The process of standardisation became much stronger at the start of the 16th century, mainly based on the urban dialect of Antwerp. The 1585 fall of Antwerp to the Spanish army led to a flight to the northern Netherlands, where the Dutch Republic declared its independence from Spain. This influenced the urban dialects of the province of County of Holland. In 1637, a further important step was made towards a unified language, when the Statenvertaling, the first major Bible translation into Dutch, was created that people from all over the new republic could understand. It used elements from various, even Dutch Low Saxon, dialects but was predominantly based on the urban dialects of Holland of post 16th century.
In the Southern Netherlands (now Belgium and Luxembourg), developments were different. Under subsequent Spanish, Austrian and French rule, the standardisation of Dutch language came to a standstill. The state, law, and increasingly education used French, yet more than half the Belgian population were speaking a variety of Dutch. In the course of the nineteenth century the Flemish Movement stood up for the rights of Dutch speakers, mostly referred to as "Flemish". However, the dialect variation was a serious disadvantage in the face of the standardised francophony. Since standardisation is a lengthy process, Dutch-speaking Belgium associated itself with the standard language that had already developed in the Netherlands over the centuries. Therefore, the situation in Belgium is essentially no different from that in the Netherlands, although there are recognisable differences in pronunciation, comparable to the pronunciation differences between standard British and standard American English. In 1980 the Netherlands and Belgium concluded the Language Union Treaty. This treaty lays down the principle that the two countries must gear their language policy to each other, among other things, for a common system of spelling.
Dutch language