Press and hold Alt + Shift. If your keyboard has two Alt keys, use the one on the left. Lift your finger from the Shift key when you see the keyboard list—keep your other finger should still be holding down the Shift key. Tap the Shift key to scroll through the different languages, and lift both fingers once the language you want to use is highlighted. As long as you choose a language other than French, you’ll be using that language’s keyboard layout instead of the French keyboard.
If you don’t see French here, click your preferred language and you should see a French or Canadian multilingual keyboard there under “Keyboards. "
If you don’t see the language of the keyboard you want to use, you’ll need to add it before you delete the French keyboard. Click the + below the keyboard list, select a language and layout, and then click Add.
Continue with this method if you want to completely delete the French keyboard from your Mac.