This UX Utility works independently of whatever skin you have but only on wince. Some skins have this facility built in so not required for them but if you have a basic skin and want extra options then this feature is for you.
By adding this zip file to your ux folder you will get Inclusion, priority setting, test method and alert settings within the sound and warnings / TTS Pro section. If it is grayed out then you have either not got a TTS voice installed or you have not chosen a voice that is TTS. Once the language is active look in the content \ voice / Voice_TTS / i18n / dictionary. and edit the appropriate file and translate to your language similar to below.