These are the manual's instructions for fixing this problem:
1. Press the Setup button, then wait for about 5 seconds.
2. Press the right-arrow button once, then press the OK button.
3. Press the right-arrow button twice, then press the OK button.
4. Press the right-arrow button repeatedly to select the rightmost menu.
5. Press the LEFT-arrow button once, then press the OK button.
6. Use the left- or right-arrow button to select the desired language for the LCD, then press the OK button.
7. The desired language is displayed on the LCD.
8. Press the Stop button.