Google Text-to-speech powers applications to read the text on your screen aloud. For example it can be used by:
• Google Play Books to Read Aloud your favourite book
• Google Translate to speak translations aloud so that you can hear the pronunciation of a word
• TalkBack and accessibility applications for spoken feedback across your device
• ... and many other applications in Play Store

To use Google Text-to-speech on your Android device go to Settings > Language & Input > Text-to-speech output. Select Google Text-to-speech Engine as your preferred engine. Note on many Android devices Google Text-to-speech is already turned on but you can update to the latest version here.

Supported languages: Bengali (Bangladesh) Cantonese (Hong Kong) Danish Dutch English (Australia) English (India) English (United Kingdom) English (United States) Finnish French German Hindi Hungarian Indonesian Italian Japanese Korean Mandarin (China) Mandarin (Taiwan) Norwegian Polish Portuguese (Brazil) Russian Spanish (Spain) Spanish (United States) Swedish Thai Turkish and Vietnamese.