Hi,
here are some useful links for downloading speech voice data:

English:

WyabdcRealPeopleTTS:
http://prdownloads.sourceforge.net/stardict/WyabdcRealPeopleTTS.tar.bz2

http://115.com/file/clydx3g1

http://www.xun6.net/file/85fae5e28/WyabdcRealPeopleTTS.rar.html

Lingos basic （10836）
Size： 24.1 MB
http://download.lingoes.cn/speech/Lingoes%20English.zip

Longman 2005 TTS - America English
Size： 99 MB
eMule :
ed2k://|file|[%E6%9C%97%E6%96%87%E7%8E%B0%E4%BB%A32005.Updated%E8%AF%AD%E9%9F%B3%E5%BA%93].American(a-z).rar|103823287|10bc801f731c95c95c12f7bfb1d7a5b8|h=OSEFYX6XYLSQJ63NF5F6QFBGZUKWB5XR|/

Longman 2005 TTS - English English
Size： 130 MB
eMule :
ed2k://|file|[%E6%9C%97%E6%96%87%E7%8E%B0%E4%BB%A32005.Updated%E8%AF%AD%E9%9F%B3%E5%BA%93].British.(a-z).rar|136447008|90111c7b96cc3e25d2d6faa709024c1e|h=U7APAQ37LTKPKPEYHSYJ4W4636NFLXZL|/

Webster 142000
Size： 372 MB
http://www.verycd.com/topics/89350/

Webster 142000 high quality
Size： 597 MB
http://www.rayfile.com/files/ce9c5661-cb54-11dd-91a1-0014221b798a/

无名语音库
http://home.ustc.edu.cn/~wchao911/Voice/voice.zip

朗文现代2005美音40340个单词（99MB）eMule下载；

朗文现代2005英音（130MB）eMule下载；

韦氏142000个单词语音库（372MB）eMule下载。

If you found any Speech voice data in any language, please share yours here, thanks!!

About how to install Speech in Momemo or Modict, please refer this tutorial:
http://www.mobabel.net/mobabel/book/momemo-android-edition-manuals#ipasp...