Microsoft has today released a new build of Windows 10, which comes loaded with Cortana support for a number of new markets. Windows 10 build 10041 now has Cortana enabled in China, the UK, France, Italy, Germany, and Spain.
Although Microsoft hasn't released a new Windows 10 for phones build today, it's save to assume these new markets will be available via Cortana on the phone preview too when that eventually launches, hopefully later this week.
You can begin giving feedback about Cortana in her new markets via the feedback button located in the bottom right of her. Microsoft is now ready to accept regional feedback for the assistant, so make sure you file every bug you come across!