Sara Dictation is a free Cydia tweak which brings Siri-like dictation on non-iPhone 4S jailbroken iDevices and includes support for several languages.
If you want to give a try to Sara Dictation, then follow the steps written below.
Step-1
Jailbreak your iDevice with RedSn0w, PwnageTool, Corona, Sn0wBreeze
Step-2
Tap on Cydia from Springboard of your jailbroken iDevice and add following repo to install Sara Dictation
http://isoftjsc.com
Step-3
Sara Dictation button will display in keyboard of your iDevice for use
See also:
SiriToggles Cydia Tweak Control Settings with Siri on iPhone 4S
Lingual Cydia Tweak Translates Text Using Siri into 30 Languages
SirSireet Cydia Tweak Uses Siri to Send Tweets from iPhone 4S
Download AssistantExtensions to Send Tweets, Search YouTube, Open Apps etc. through Siri
How to Add Siri Dictation to iPhone 4, 3GS and iPod Touch 4G