It was during the last years of the medieval period and the first ones of the modern period (15th to 17th centuries), that a continuous process of standardization of the English language was observed, in the territory that extends south of the border with Scotland.
The language spoken and written in London (The London Standard) continued to evolve, extending its use among the higher sectors of society, especially in formal contexts. The other regional varieties were displaced, under the stigma that indicated lack of social prestige and education.
In 1476, William Caxton introduced the first printing machine in England and through this new medium, the London Standard extended its influence throughout the country. Books became more affordable for the common population and literacy spread. The works in English became more common, while the opposite happened with the works in Latin. Writing and grammar rules were established and, in 1604, the first English language dictionary was published.