Cortana is optimized for specific language and market pairings. She works best when your region and language settings are aligned. The following is a list of regions where Cortana is available and the corresponding language that Cortana is optimized for in each of those regions.
Cortana is available in these regions for these languages:
China: Chinese (Simplified)
United Kingdom: English
United States: English
Note: If you change your region, you might not be able to shop at the Store or use things you've purchased, like memberships and subscriptions, games, movies, TV, and music.
Update: If your settings are correct but you still can't use Cortana, installing the latest Windows Updates might fix the problem.
Article ID: 4026948 - Last Review: 2017, ഓഗ 1 - Revision: 1