Canon PowerShot SD400 Digital Elph User Manual page 34

You can display the Language menu directly by holding down the
FUNC./SET button and pressing the MENU button while in single
image playback or index playback mode.
32
Use the ,
5
select a language and press the
FUNC./SET button.
Press the MENU button.
6
The display will return to the shooting or
playback screen.
, or button to