This is not true. The standardization of the french language started with Francois I, centuries before the revolution.
[1] https://en.wikipedia.org/wiki/Ordinance_of_Villers-Cotter%C3... [2] https://en.wikipedia.org/wiki/Language_policy_in_France#Fren...
In addition, when the colonists settled in New France and mixed together, standard French (the concept probably wasn't there at the time, but administrative French maybe) was the natural common denominator for them.
Normands spoke French long before some emigrated to North America. Just ask the English.