Update language_de.h for German translation

@MarlinFirmware/language-team my changes for the German language. Feel free to improve :)

Marlin/language_de.h

@@ -171,4 +171,52 @@
 #define MSG_DELTA_CALIBRATE_Z               "Kalibriere Z"
 #define MSG_DELTA_CALIBRATE_CENTER          "Kalibriere Mitte"
 
+#define MSG_INFO_MENU                       "Über den Drucker"
+#define MSG_INFO_PRINTER_MENU               "Drucker Info"
+#define MSG_INFO_STATS_MENU                 "Drucker Stats"
+#define MSG_INFO_BOARD_MENU                 "Board Info"
+#define MSG_INFO_THERMISTOR_MENU            "Thermistors"
+#define MSG_INFO_EXTRUDERS                  "Extruders"
+#define MSG_INFO_BAUDRATE                   "Baud"
+#define MSG_INFO_PROTOCOL                   "Protokol"
+#define MSG_INFO_TOTAL_PRINTS               "Gesamte Drucke"
+#define MSG_INFO_FINISHED_PRINTS            "Beendete Drucke"
+#define MSG_INFO_PRINT_TIME                 "Gesamte Druckzeit"
+#define MSG_INFO_MIN_TEMP                   "Min Temp"
+#define MSG_INFO_MAX_TEMP                   "Max Temp"
+#define MSG_INFO_PSU                        "Stromversorgung"
+
+#define MSG_FILAMENT_CHANGE_HEADER          "ÄNDERE FILAMENT"
+#define MSG_FILAMENT_CHANGE_OPTION_HEADER   "ÄNDERE OPTIONEN:"
+#define MSG_FILAMENT_CHANGE_OPTION_EXTRUDE  "Extrude mehr"
+#define MSG_FILAMENT_CHANGE_OPTION_RESUME   "Drucke weiter"
+
+#if LCD_HEIGHT >= 4
+  #define MSG_FILAMENT_CHANGE_INIT_1          "Warte auf den"
+  #define MSG_FILAMENT_CHANGE_INIT_2          "Start zum "
+  #define MSG_FILAMENT_CHANGE_INIT_3          "Filament wechsel"
+  #define MSG_FILAMENT_CHANGE_UNLOAD_1        "Warte auf das"
+  #define MSG_FILAMENT_CHANGE_UNLOAD_2        "herrausnehmen"
+  #define MSG_FILAMENT_CHANGE_UNLOAD_3        "des Filaments"
+  #define MSG_FILAMENT_CHANGE_INSERT_1        "Fädel Filament"
+  #define MSG_FILAMENT_CHANGE_INSERT_2        "ein und drücke"
+  #define MSG_FILAMENT_CHANGE_INSERT_3        "den Knopf..."
+  #define MSG_FILAMENT_CHANGE_LOAD_1          "Warte auf das"
+  #define MSG_FILAMENT_CHANGE_LOAD_2          "laden des"
+  #define MSG_FILAMENT_CHANGE_LOAD_3          "Filaments"
+  #define MSG_FILAMENT_CHANGE_EXTRUDE_1       "Warte auf das"
+  #define MSG_FILAMENT_CHANGE_EXTRUDE_2       "Extruden des"
+  #define MSG_FILAMENT_CHANGE_EXTRUDE_3       "Filaments"
+  #define MSG_FILAMENT_CHANGE_RESUME_1        "Warte auf das"
+  #define MSG_FILAMENT_CHANGE_RESUME_2        "fortfahren des"
+  #define MSG_FILAMENT_CHANGE_RESUME_3        "Druckes"
+#else // LCD_HEIGHT < 4
+  #define MSG_FILAMENT_CHANGE_INIT_1          "Bitte warten..."
+  #define MSG_FILAMENT_CHANGE_UNLOAD_1        "Auswerfen..."
+  #define MSG_FILAMENT_CHANGE_INSERT_1        "Laden und Klick"
+  #define MSG_FILAMENT_CHANGE_LOAD_1          "Laden..."
+  #define MSG_FILAMENT_CHANGE_EXTRUDE_1       "Extruden..."
+  #define MSG_FILAMENT_CHANGE_RESUME_1        "Weitermachen..."
+#endif // LCD_HEIGHT < 4
+
 #endif // LANGUAGE_DE_H