In the new updated taskbar for Windows 10, you’ll find a new search box, which is where Microsoft’s digital assistant, Cortana, lives. Once you click on it, she will launch and you can immediately see a summary of your interests; you can type as many question you interested in, and more importantly, you can use your voice to ask her anything.
Although, at the preview stage of Windows 10, Cortana only understands English, soon Microsoft will expand the available languages she can interact to more regions. However, there will be always an issue for non-native speakers of the language. Cortana will always do her best to understand what you’re asking, but it will never be the same for those who don’t speak the language as the native speakers.
For this reason, Microsoft is including in Windows 10 an option in the Settings apps to improve Cortana to better assist non-native speakers.
If you happen to be using Windows 10 with a language that is not on your native language, just open the Settings app, navigate through System, go to Speech, and check the “Use speech patterns for non-native speakers of this language”.
You’re done. Also, make sure you have the Spoken language set to the correct one.