HTC One M8 User Manual page 204

204 Settings and security
TalkBack language settings
1. Go to Settings, and then tap Accessibility.
2. Tap Text-to-speech output > Google Text-to-speech Engine, and do one of the
following:
Select a different
language
Install a voice
3. Select the language you want to use.
Not all languages are supported.
Tap Language.
Tap Install voice data, and then tap the language. Tap
next to the voice data you want to install. When
installation is completed, press
Language.
twice and tap