I'm not sure how often macrho checks in to the forum. Can you be more specific when you say that you're "having the same issue"?
Are you saying that VC was working fine for you using Windows 8.1, until you installed some updates and then suddenly you started to receive the "no languages suitable for speech" message?
(I don't think macrho was referring to German TTS, but to the German language pack, though he's not very clear.)
If you can provide more details about your setup and the specific circumstances, maybe we can help.