Throughout history, it seems that the common vernacular has always overpowered the languages that had been taught to the more educated.
Notable examples would be: Greek in Rome, being the language of the educated, and Latin, being the language of the commonfolk.
Latin was spoken as the language of kings and scholars in France, while French was the language of the commonfolk.
In England, French was considered a sophisticated language, practiced by those with power.
However, all these polished languages fell into disuse, with the language of the common people ultimately reigning supreme.
Why does this occur?