sigh...
https://education.alberta.ca/media/1626737/91383-attachment-1-guidelines-final.pdf
I live in Alberta. There is no such ban. I believe that this is the document in question where the biggot that made these accusations pulled the claim from, and even when reading through the entire thing the closest thing I found to anything regarding that was "Example of best practice in action." Not a requirement or ban, but a suggestion and what was the most ideal practice. It was also for documentation and writing.
School forms, websites,letters, and other communications usenon-genderedand inclusive language (e.g., parents/guardians,caregivers,families, partners, “student” or “their” instead of Mr., Ms., Mrs., mother, father, him,her, etc.).
The paragraph right under was this.
Staff use appropriate language to acknowledge and communicate with families. If unsure of the appropriate language,they ask the family for guidance (e.g., how children refer to their parents and/or their parents’ partners).
If they want to be called mom and dad, then that is how to refer to them. If you're unsure ask. There was nothing on banning any pronouns or gender specific titles.