Related: Is "System.Speech.Recognition" namespace available in mono framework?
I\'m aware that the System.Speech namespace is available in mono according t
Maybe you have misunderstood the charts,
http://go-mono.com/status/
The first column is for .NET 4.0 vs .NET 4.5, which is purely the comparison of Microsoft's stuffs. Thus, System.Speech is listed there.
You can see that when Mono's stuffs are compared to Microsoft's, System.Speech is not listed.
That simply indicates Mono does not yet attack in this area, and which is meaningful. System.Speech heavily relies on Microsoft's speech engine inside Microsoft Windows platforms, which Mono is not easy to clone on other platforms.