Mac switches to French Canadian CSA keyboard

The best way to fix this is to go to system settings / keyboard / text input / edit / all input sources and use the minus button at the bottom to remove CSA, so you don’t have to worry about the other shortcuts that can also change keyboards.

If you have multiple keyboard input sources, there is a keyboard shortcut that switches source. Go to System Settings > Keyboard > Keyboard Shortcuts > Input Sources and turn off the keyboard shortcut or change it to something you are not likely to use by mistake.

You are most welcome! Have a great evening!