I finally managed to make some kind of dicttaion work in games (I mainly use is in socials games like Space Station 14)

I used the following steps:

• You may need some preriquisite : Use discover to install zip and git if missing
• Install PIP and VOSK in python In desktop run Konsole then the following commands :

    
python3 -m ensurepip --upgrade
python3 -m pip install --upgrade
python3 -m pip install vosk --break-system-packages

  

• Install NerdDIctation

    
git clone https://github.com/ideasman42/nerd-dictation.git
cd nerd-dictation
wget https://alphacephei.com/kaldi/models/vosk-model-small-en-us-0.15.zip
unzip vosk-model-small-en-us-0.15.zip
mv vosk-model-small-en-us-0.15 model


  

You may be able to use other languages by using other models.

• Configure xbindkeys With Nano edit the file /home/deck/.xbindkeysrc to add

    
#Start dictation
"/home/deck/nerd-dictation/nerd-dictation begin --vosk-model-dir=/home/deck/nerd-dictation/model"
   Alt + comma

#End dictation
"/home/deck/nerd-dictation/nerd-dictation end"
   Alt + period

  

• Restart the steamdeck
• Test the configuration In a fresh desktop session, open a konsole and call xbindkeys. Ensure that your buttons for starting and stopping dictation work.
• Adding a shortcut to game mode
  • The decky way : Install the plugin Bash Shortcut configure a new shortcut - Name : Dictation - Command : konsole --noclose -e xbindkeys
  • The old way : Add konsole as a non-steam game (no arguments needed, or at least -e didn't work for me) Restart In game mode, open konsole and run xbindkeys
• Bind two button in the steam controller configuration for the games you wish to use dictation with. I use this (I personnaly use R5 to start the dictation and L5 to stop the dictation) :
  • L5 as "Alt key" with ". key" as a sub key
  • R5 as "Alt key" with ", key" as a sub key
• To use normaly, run the bash shortcut before running a game.

Tell me if you got errors, I would be more that happy to help you solve problems