It sounds like you accidentally changed the keyboard layout to Greek while setting up AutoCorrect symbols. This can happen if you accidentally hit a keyboard shortcut or if you have multiple keyboard layouts installed on your computer.
To change the keyboard layout back to US within Word, you can follow these steps:
- Click on the "File" tab in the top left corner of the screen.
- Click on "Options" at the bottom of the left-hand menu.
- In the Word Options dialog box, click on "Language" in the left-hand menu.
- Under "Choose Editing Languages", select "English (United States)" from the drop-down menu.
- Click on "Set as Default" to make this the default language for all new documents.
- Click "OK" to save your changes and close the Word Options dialog box.
If you accidentally switch to a different keyboard layout in the future, you can switch back to the US layout by pressing the Windows key + Spacebar on your keyboard. This will cycle through all the keyboard layouts you have installed on your computer.