Tip:
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X
Slide out the charm bar from the right edge and click "Settings"
Press "Change PC settings" and choose "General"
Choose "Language preferences"
Press "Add a language", choose the display language and click "Add"
You have to download the language package if your tablet don't have it
Press Options" under the language and choose "Download and install package"
Press "Advanced settings" and choose the language under "Window display language"
Click "Save" and it will be automatically displayed the language after you log off
Method 2: Use "Search" to find the "Add a language"