As he said
Quote Originally Posted by Kajoe View Post
...Nextgen Dutch Language files and Voices are made by me.

If you want a quick and stable Nextgen, remove all unneeded languages, voices and schemes. Also in folder: tts_nua_ve1.Do only use the maps you need.
You must remove all Dutch TTS files, lang and voices, keep only english. Add better lang/voice files, since the package was released two and a half years ago, and the files have been corrected in the meantime
Don't ask where they are, you've been a member of this forum for more then five years, browse it a bit