Xbox voice commands will not be available in all markets on the product release date. Voice commands will be available at launch in US, UK, CA, FR, and DE.
http://www.xbox.com/en-US/xbox-one/get-the-facts?xr=shellnav
But the issue with other countries was the localization of voice commands... so this fact just killed that other news: http://gamrconnect.vgchartz.com/thread.php?id=167098 or we will just just five countries launch.
Damit.
UPDATE: MS Response.
http://gamrconnect.vgchartz.com/post.php?id=5626169