Hi,
Windows Anytime Upgrade isn't included in this version of Windows. Instead, you can use Add features to Windows 8 to get a different edition.
In Add features to Windows 8, you can get an edition of Windows 8 that has more features than your current edition.
To get a new edition, you need to buy a product keythey're available at electronics stores. Make sure to buy a product key that's specifically for Add features to Windows 8. And you can also
buy a product key online in some countries and regions.
Once you buy a product key and enter it into Add features to Windows 8, new features will be added to your PC automatically and you'll have a new edition of Windows 8. Nothing will happen to
your apps, files, and settings.
Of course, it will not affect your language settings.
To add more features, please follow this article:
Get more from Windows 8
http://windows.microsoft.com/en-us/windows-8/feature-packs
More information, you can refer to this article:
Add features to Windows 8: FAQ
http://windows.microsoft.com/en-IN/windows-8/add-features-frequently-asked-questions
Hope these could be helpful.