Why isn't the Microsoft Windows 10 Cortana application in my region or language?

Reference the information that is provided below concerning what Region and Language support Microsoft Windows 10 provide for the Cortana application.

Cortana has limited Region and Language support.

Cortana translation settings are based on the Regional and Language settings of your Microsoft Windows 10 installation. At launch, Cortana may not support your selected language and provide insufficient or incorrect translations of nonsupported language configurations.

NOTE: After installation of the Windows 10 Anniversary update,  Cortana Support is widened and limitations were reduced.

This is a Microsoft limitation of the application.

NOTE: Dell has no control over the regional functionality of Cortana, this is a Microsoft support decision.

Use supported Region and Language settings.

Refer to the link below for supported Regions and Languages for Cortana.

All these settings must be set to the same language to use Cortana:

• Languages (this is your system, computer, and device language)
• Speech language (a Windows language pack must be installed for your language)
• Country or region

NOTE: If you change your region, you might not be able to shop at the Windows Store, or use items you have purchased, like memberships and subscriptions, games, movies, TV, and music.

NOTE: Support for countries or regions that are not listed is subject to development by Microsoft; there is no expected release date for additional countries or regions.

REFERENCES

Cortana's regions and languages