This is the first time I have ever encountered this problem and I have yet to figure it out. If I install the google TTS speech engine, or even the Vocalizer speech engine the installation looks like it installs properly. But upon further inspection the TTS options do not appear anywhere within androids language options.

When I select a TTS voice in iGO nextgen it freezes the unit (doesn't matter which installation).

iGO nextgen otherwise works flawlessly. I have never had this issue on any other device.


My guess is that a key Android component that TTS relies on may have been removed from the Android installation.
The unit is a fairly standard no-name 2DIN unit with a fake Android 6.0 installation (It is actually KitKat 4.4)

If the underlying TTS engine is broken on the unit, I would think there is no fix.
Has anyone else encountered this issue? Any suggested fix? alternative ways to enable TTS?