A word has multiple definitions.
In English (or French), milk can also describe a while liquid. There are six definitions for milk on Wiktionnary, and here is the second one:
(uncountable, by extension) A white (or whitish) liquid obtained from a vegetable source such as almonds, coconuts, oats, rice, or soy beans
There is also something called cement milk
A watery film of a dull white or gray color often appears on the surface. This white matter is the so-called cement milk.
I was walking under a decrepit elevated expressway and there were signs saying to be careful about cement milk dripping from the ceiling. I don't think there's any mammal involved in producing that type of milk.
This is wrong and insulting. Si t'es un québecois (ou francophone), sors-toi ce mythe prescriptiviste de la tête.
Are you going to say that the Swiss dont speak "real" German? Brazilian Portuguese is a bastardized Portuguese? All the different variations of Spanish are not all Spanish?
AFAIK there is no linguistic process called bastardization. French in Québec, or in Canada, is French.