[Cerrado] WPML Language Source for Existing French Content

Background of the issue:
I am trying to switch all existing French translations on Carbonaut staging so they pull from EN-CA instead of EN-US and correct all WPML configuration issues. The original requirement was to set CAN-EN as the primary WPML language so French duplicates directly from EN-CA. The issue can be seen at enlace oculto.

Symptoms:
Existing French content continues pulling from EN-US instead of EN-CA.

Questions:
How can I switch existing French translations to pull from EN-CA instead of EN-US?
How can I correct WPML configuration issues without using credits?