Convert text to speech offline with the ability to adjust the speed of speech and support 6 locales:

• English
  
  
• American
  
  
• British
  
  
• Canadian
  
  
• French
  
  
• Canada French
  
  

This app is free and open source, and its source code is available on GitHub: https://github.com/AlirezaIvaz/TextToSpeech