Lexus 2004 GX470 Owner's Manual page 330

Push the "Sub Title" switch on the screen or the "SUB
TITLE" button on the controller, and the changing subtitle
language screen will appear.
Each time you push the "Sub Title" switch, another
language stored on the disc is selected.
To turn off the subtitles, push the "Hide" switch.
Push the "Back" switch to return to the previous screen.
The selected subtitle language will appear on the screen.
(h) Changing audio language
"
1 Controller button 2 Screen switch
DVD video only —
Push the "Audio" switch on the screen or the "AUDIO"
button on the controller, and the changing audio language
screen will appear.
Finish
AUDIO
315