From the Window menu, select Preferences. Dialog Designer displays the Preferences dialog box.
In the navigation (left) pane of the Preferences dialog box, expand the Avaya Dialog Designer entry, and then select Languages.
The right pane of the Preferences dialog box displays the Languages options.
In the Text To Speech box, select the language you want to delete.
Click Delete. Dialog Designer displays a Question dialog box that asks you to confirm the deletion.
To confirm the deletion, click OK. Dialog Designer displays a Warning dialog box that informs you that removing the language might invalidate projects.
To confirm the deletion and remove the TTS language, click Yes.