dde-dock/plugins/keyboard-layout/keybord_layout.json

{
    "data": {
        "text": {
            "dbus_service": "com.deepin.dde.Keyboard",
            "dbus_path": "/com/deepin/dde/Keyboard",
            "dbus_interface": "com.deepin.dde.Keyboard",
            "dbus_properties": "layout"
        }
    },
    "action": {
        "trigger": {
            "dbus_service": "com.deepin.dde.Keyboard",
            "dbus_path": "/com/deepin/dde/Keyboard",
            "dbus_interface": "com.deepin.dde.Keyboard",
            "dbus_method": "onClicked"
        }
    }
}