Iphone voice to text & back to voice API [closed]

Question

I want in my iphone app , Voice to Text and then back to Voice.

I tried searching on forum and Google and found some APIs like OpenEars, Vocal Kit and tts , but these are all for English Languages and not for other languages like German , French and Spanish, Chinese, etc.

Is there any Free API for this and I am missing it on Google or there isn't any API for this? Please Help

The existing apps in App Store like Jibbigo and MLD are using such functionality , so what are they using??

ANSWER by Paul Dixon

The Nuance API is free for development but asks to purchase before going live in the APP Store, so it should be accepted that there is no free API ,,, please help guys

Answer 1

Nuance offers a speech recognition and TTS API for mobile devices.

http://dragonmobile.nuancemobiledeveloper.com/

According to this post speech recognition is available in eight languages and TTS in 35 languages.