Dear cam1981,
The syntax indicated by our friend jjsxjjsx works fine. I, for example, also make use of this.
" In each section (alert type) I used:
say_camera_speed_limit = 1; Speak speeds
or
say_camera_speed_limit = 0; Do not speak speed "

The "Say camera speed limit" field is a new field created by you for the Pongo skin ?