Update German language (#13853)

Marlin/src/lcd/language/language_de.h

 #define MSG_PREPARE                         _UxGT("Vorbereitung")
 #define MSG_TUNE                            _UxGT("Justierung")
 #define MSG_START_PRINT                     _UxGT("Starte Druck")
-#define MSG_BUTTON_PRINT                    _UxGT("Drucke")
+#define MSG_BUTTON_NEXT                     _UxGT("Weiter")
+#define MSG_BUTTON_INIT                     _UxGT("Init")
+#define MSG_BUTTON_STOP                     _UxGT("Stop")
+#define MSG_BUTTON_PRINT                    _UxGT("Drucken")
+#define MSG_BUTTON_RESET                    _UxGT("Zurücksetzen")
 #define MSG_BUTTON_CANCEL                   _UxGT("Abbrechen")
+#define MSG_BUTTON_DONE                     _UxGT("Fertig")
 #define MSG_PAUSE_PRINT                     _UxGT("SD-Druck pausieren")
 #define MSG_RESUME_PRINT                    _UxGT("SD-Druck fortsetzen")
 #define MSG_STOP_PRINT                      _UxGT("SD-Druck abbrechen")
 #define MSG_BLTOUCH_DEPLOY                  _UxGT("BLTouch ausfahren")
 #define MSG_BLTOUCH_SW_MODE                 _UxGT("BLTouch SW-Modus")
 #define MSG_BLTOUCH_5V_MODE                 _UxGT("BLTouch 5V-Modus")
-#define MSG_BLTOUCH_STOW                    _UxGT("BLTouch einfahren")
+#define MSG_BLTOUCH_OD_MODE                 _UxGT("BLTouch OD Mode")
 #define MSG_BLTOUCH_STOW                    _UxGT("BLTouch einfahren")
 #define MSG_MANUAL_DEPLOY                   _UxGT("Z-Sonde ausfahren")
 #define MSG_MANUAL_STOW                     _UxGT("Z-Sonde einfahren")
 #define MSG_MMU2_FILAMENT2                  _UxGT("Filament 3")
 #define MSG_MMU2_FILAMENT3                  _UxGT("Filament 4")
 #define MSG_MMU2_FILAMENT4                  _UxGT("Filament 5")
-#define MSG_MMU2_RESET                      _UxGT("setz MMU zurück")
+#define MSG_MMU2_RESET                      _UxGT("setze MMU zurück")
 #define MSG_MMU2_RESETTING                  _UxGT("MMU zurücksetzen...")
 #define MSG_MMU2_EJECT_RECOVER              _UxGT("Entfernen, klicken")
 
 #define MSG_COMMIT_VTOOL                    _UxGT("V-Tool Mix sichern")
 #define MSG_VTOOLS_RESET                    _UxGT("V-Tools ist resetet")
 #define MSG_START_Z                         _UxGT("Z Start")
-#define MSG_END_Z                           _UxGT("Z End")
+#define MSG_END_Z                           _UxGT("Z Ende")
 #define MSG_BRICKOUT                        _UxGT("Brickout")
 #define MSG_INVADERS                        _UxGT("Invaders")
 #define MSG_SNAKE                           _UxGT("Sn4k3")
   #define MSG_FILAMENT_CHANGE_RESUME_3      _UxGT("Drucks...")
 #else // LCD_HEIGHT < 4
   #define MSG_ADVANCED_PAUSE_WAITING_1      MSG_USERWAIT
+  #define MSG_PAUSE_PRINT_INIT_1            _UxGT("Parken...")
   #define MSG_FILAMENT_CHANGE_INIT_1        _UxGT("Bitte warten...")
   #define MSG_FILAMENT_CHANGE_INSERT_1      _UxGT("Laden und Klick")
   #define MSG_FILAMENT_CHANGE_HEAT_1        _UxGT("Klick zum Heizen")