Hi all, I would like to add on speech recognition into my games. Like when player speak the word, i need to check whether they have prounciate correctly. I have done some research and i was told that it is possible to implement it into the game. I need Unity Pro and use plugin. Anyone have done something similar before or know how i could implement into the game?? Thank you 
Like this link explains, there is no plugin that implements speech recognition in Unity. To get that working, you’d need to do the actual signal analysis and pronounciation recognition yourself, and let me warn you right now: That stuff entails some seriously hardcore mathematics. Believe me when I say this is NOT something you want to undertake lighthearted; reliable signal processing is a mindbogglingly difficult piece of science. Sorry. 
Hi there!
Unfortunately, Christian is correct about how uneasy it is to incorporate speech recognition into games. My team and I actually took weeks to put together a cross-platform speech recognition plugin for Unity.
Anyway, extending Unity by developing plugins is the way to go. Unity’s plugin interface is actually pretty straightforward - the online documentation was all that we needed to make the plugin work. The greater and more difficult part is learning and natively implementing speech recognition.
It’s nice to hear that you’re on to the same idea that we’re working on but I believe this goes way outside Unity now. Feel free to drop me a line if you want to discuss this further.