HP Customer Support
HP Photosmart C5100 and C5200 All-in-One series - HP All-in-One Display is in the Wrong Language after Setup
After setting up the product, the wrong language displays on the control panel.
Follow these steps to resolve the issue.
Unplug the power cord from the back of the product.
Press and hold the OK button () and the Help button () simultaneously, and reconnect the power cord.
Continue pressing the buttons until the display goes blank or Reset shows on the control panel display.
If the product automatically turns off, turn it on.
Allow the product to fully start up before continuing with the product setup.
Select the correct language code and region when the product prompts.
The wrong language was selected while setting up the product.
Ask the community!