Google ANDROID 2.3.4 - Manual (Page 379)

Settings 379
AUG-2.3.4-105 Android User’s Guide
Language Opens a dialog where you can select the language of the text you want
the synthesizer to read. This is particularly useful in combination with the Always Use
My Settings setting, to ensure that text is spoken correctly in a variety of applications.
Engines Lists the text-to-speech engines installed on your phone. Touch one to
view or change its settings.