Is it possible to change the "text to voice" language?

I just found out that I can change the “recognized words” by editing words.txt, which is perfect since I can adjust them to my individual needs!

The logical next step would be to add words in my (and my childs 😉) native language German. In order for this to make sense, I’d also like to hear those recognized words pronounced correctly by a “German voice”.

Is it possible to change the voice to a German one by adjusting some file or windows system setting?

[DennisGaida]

Figured out that changing the text-to-speech language is rather easy: Use the Windows language preference selector (keyboard/language). Changing that from English to German also changed the text-to-speech voice for me.

[CombeeMike]

I managed to change the language by adjusting the code & making a custom build of mine:

Controller.cs:ThreadedSpeak constructor

// Original
CultureInfo keyboardLanguage = System.Windows.Forms.InputLanguage.CurrentInputLanguage.Culture;
InstalledVoice neededVoice = this.SpeechSynth.GetInstalledVoices(keyboardLanguage).FirstOrDefault();

// Force german voice
CultureInfo culture = CultureInfo.GetCultureInfo("de-DE");
InstalledVoice neededVoice = this.SpeechSynth.GetInstalledVoices(culture).FirstOrDefault();

I guess there’s no way right now to change this via some some config file etc. but only by either creating a custom build like I did or by changing the default input language which I wanted to avoid for several reasons.