Update German/Italian language (#14482)

Marlin/src/lcd/language/language_de.h

 #define MSG_LASER_OFF                       _UxGT("Laser aus")
 #define MSG_LASER_ON                        _UxGT("Laser an")
 #define MSG_LASER_POWER                     _UxGT("Laserleistung")
+#define MSG_SPINDLE_MENU                    _UxGT("Spindel-Steuerung")
+#define MSG_SPINDLE_OFF                     _UxGT("Spindel Aus")
+#define MSG_SPINDLE_ON                      _UxGT("Spindel An")
+#define MSG_SPINDLE_POWER                   _UxGT("Spindelleistung")
 #define MSG_SPINDLE_REVERSE                 _UxGT("Spindelrichtung")
 #define MSG_SWITCH_PS_ON                    _UxGT("Netzteil ein")
 #define MSG_SWITCH_PS_OFF                   _UxGT("Netzteil aus")
 #define MSG_BLTOUCH_STOW                    _UxGT("BLTouch einfahren")
 #define MSG_BLTOUCH_MODE_ECHO               _UxGT("BLTouch Modus: ")
 #define MSG_BLTOUCH_MODE_CHANGE             _UxGT("ACHTUNG: Falsche Einstellung - kann zu Beschädigung führen! Fortfahren?")
+#define MSG_TOUCHMI_PROBE                   _UxGT("TouchMI")
+#define MSG_TOUCHMI_INIT                    _UxGT("TouchMI initial.")
+#define MSG_TOUCHMI_ZTEST                   _UxGT("Test Z-Versatz")
+#define MSG_TOUCHMI_SAVE                    _UxGT("Speichern")
+#define MSG_MANUAL_DEPLOY_TOUCHMI           _UxGT("TouchMI ausfahren")
 #define MSG_MANUAL_DEPLOY                   _UxGT("Z-Sonde ausfahren")
 #define MSG_MANUAL_STOW                     _UxGT("Z-Sonde einfahren")
 #define MSG_HOME                            _UxGT("Vorher") // Used as MSG_HOME " " MSG_X MSG_Y MSG_Z " " MSG_FIRST

Marlin/src/lcd/language/language_it.h

 #define MSG_TOUCHMI_PROBE                   _UxGT("TouchMI")
 #define MSG_TOUCHMI_INIT                    _UxGT("Inizializ.TouchMI")
 #define MSG_TOUCHMI_ZTEST                   _UxGT("Test Z offset")
-#define MSG_TOUCHMI_SAVE                    _UxGT("Memorizzae")
+#define MSG_TOUCHMI_SAVE                    _UxGT("Memorizzare")
 #define MSG_MANUAL_DEPLOY_TOUCHMI           _UxGT("Estendi TouchMI")
 #define MSG_MANUAL_DEPLOY                   _UxGT("Estendi Sonda-Z")
 #define MSG_BLTOUCH_STOW                    _UxGT("Ritrai BLTouch")