Make sure the spell check feature is turned on and configured correctly. Check the program settings to ensure your desired language is configured correctly.

Ensure your keyboard is configured correctly and has the necessary language settings.

Make sure the browser is set to the right language. Clear any cached data and double check all language settings.

Ensure all applications are up to date. This includes software updates, patching, and system updates.

Make sure the correct drivers are installed. Install any necessary updates.