If you see this log entry, you haven’t installed a Windows speech recognizer for your current selected language in DRE.
For instance, you could have chosen German in DRE as the language but have no German speech recognizer installed.
This may be okay if your installed English recognizer still recognizes your german speech.
Still, you should check if you are able to install a specific German speech recognizer to improve speech recognition.
Please see this Microsoft article on how to install speech recognizers