If you rely on a Canadian Will alone, your estate needs to go through a double-probate process: a probate in Canada and a probate in Mexico.
Only after your Will has been probated and legally recognized in Canada your heirs can start the Mexican recognition process.
If you own a property (outside the restricted zone in Mexico), it is highly recommended to prepare a Mexican Will, which deals only with your Mexican assets.
The two Wills (Canada an Mexico) must be coordinated, to ensure that the Mexican Will does not revoke the Canadian Will, and vice versa.