In this Windows Phone 8.1 update, Microsoft has segregated language and region settings, no longer bundling them together as in Windows Phone 8. Adding and switching languages remains straightforward:
How to Add and Switch Languages on Windows Phone 8.1:
Step 1: Access Settings
Step 2: Proceed to Language
Step 3: Click on Add Language (the plus sign icon) to introduce a new language.
Step 4: Choose the language you wish to add from the list.
Step 5: Restart your phone to apply the selected language.
Step 6: To revert to the original language or switch between available ones, press and hold on the desired language then select Move Up.
Step 7: Restart your device to implement the changes.
So now, you can easily switch between various languages according to your preference on Windows Phone 8.1. Moreover, on Windows Phone 8.1, there's the incredibly exciting Asphalt 8 racing game waiting for you to download and give it a try!
https://Mytour.vn/them-va-chuyen-doi-ngon-ngu-tren-windows-phone-81-1685n.aspx