When you launch X410, it automatically selects a keyboard layout that will be used for Linux GUI apps based on Windows settings. X410 currently doesn't have an option to change this initially selected keyboard layout while it's running. However, you can change it from Linux command-line or Linux desktop environment.
Please note that some languages (ex. Chinese/Japanese/Korean) require an input method editor (IME) in order to properly enter full characters. This post doesn't consider such IME's and only focuses on selecting a keyboard layout.
If you're running a full Linux desktop environment such as Xfce, it should already have its own keyboard settings section. For example, the following screenshot shows the keyboard settings in Xfce. You shouldn't have any problem setting up the keyboard via those options.
Please note that when selecting a keyboard combination for switching layouts, make sure it's not already used by other apps or Windows.
Windowed Apps Mode
If you launched X410 in Windowed Apps mode, you can use "setxkbmap" from Linux command-line.
setxkbmap [ args ] [ layout [ variant [ option ... ] ] ]
If you're using a Debian based Linux distro such as Ubuntu and getting an error message about not finding the setxkbmap command, try installing "x11-xkb-utils" package. You also need to install "xkb-data" package for the actual keyboard layout data.
sudo apt install x11-xkb-utils xkb-data
To view a full list of available keyboard layouts and options, you can use the following command:
After finding suitable keyboard layout arguments for setxkbmap, you can add the command to your login script (ex. ~/.bashrc) or create a separate Windows batch file (*.bat) that launches X410 and executes the command.
REM ### Start X410 in Windowed Apps Mode
start /B x410.exe /wm
REM ### Set the keyboard layout to English (US) DVORAK
ubuntu1804.exe run "DISPLAY=127.0.0.1:0.0 setxkbmap us -variant dvorak"
This batch file briefly opens a Command Prompt window. If you want to hide it, you can use the method described in "Running Xfce Desktop on Kali Linux" (Windows shortcut method)
or "Creating a Windows Shortcut for Linux GUI Desktop" (Visual Basic script method)