Updated german translations in language.h and eliminated a few double lines.

Marlin/language.h

 // 1  Custom (For you to add your own messages)
 // 2  English 
 // 3  French	(Waiting translation)
-// 4  German	(Waiting translation)
+// 4  German
 // 5  Etc
 
 #define LANGUAGE_CHOICE 1  // Pick your language from the list above
 	#define MSG_PART_RELEASE "Partial Release"
 	#define MSG_KILLED "KILLED. "
 	#define MSG_STOPPED "STOPPED. "
-	#define MSG_PREHEAT_PLA " Preheat PLA"
-	#define MSG_PREHEAT_ABS " Preheat ABS"
 	#define MSG_STEPPER_RELEASED "Released."
-  #define MSG_CONTROL_RETRACT  " Retract mm:"
-  #define MSG_CONTROL_RETRACTF " Retract  F:"
-  #define MSG_CONTROL_RETRACT_ZLIFT " Hop mm:"
-  #define MSG_CONTROL_RETRACT_RECOVER " UnRet +mm:"
-  #define MSG_CONTROL_RETRACT_RECOVERF " UnRet  F:"
-  #define MSG_AUTORETRACT " AutoRetr.:"
+	#define MSG_CONTROL_RETRACT  " Retract mm:"
+	#define MSG_CONTROL_RETRACTF " Retract  F:"
+	#define MSG_CONTROL_RETRACT_ZLIFT " Hop mm:"
+	#define MSG_CONTROL_RETRACT_RECOVER " UnRet +mm:"
+	#define MSG_CONTROL_RETRACT_RECOVERF " UnRet  F:"
+	#define MSG_AUTORETRACT " AutoRetr.:"
 
 // Serial Console Messages
 
 #if LANGUAGE_CHOICE == 4
 
 // LCD Menu Messages
-
-	#define WELCOME_MSG MACHINE_NAME " Ready."
-
-	#define MSG_SD_INSERTED "Card inserted"
-	#define MSG_SD_REMOVED "Card removed"
-	#define MSG_MAIN " Main \003"
+	#define WELCOME_MSG MACHINE_NAME " Bereit."
+	#define MSG_SD_INSERTED "Karte eingelegt"
+	#define MSG_SD_REMOVED "Karte entfernt"
+	#define MSG_MAIN " Haupt \003"
 	#define MSG_AUTOSTART " Autostart"
-	#define MSG_DISABLE_STEPPERS " Stepper abschalten"
+	#define MSG_DISABLE_STEPPERS " Motoren abschalten"
 	#define MSG_AUTO_HOME " Auto Heim"
 	#define MSG_SET_ORIGIN " Position setzen"
+	#define MSG_COOLDOWN " Abkuehlen"
+	#define MSG_EXTRUDE " Druck"
 	#define MSG_PREHEAT_PLA " Aufheizen PLA"
 	#define MSG_PREHEAT_ABS " Aufheizen ABS"
-	#define MSG_COOLDOWN " Abkuehlen"
-	#define MSG_EXTRUDE " Extrude"
-	#define MSG_PREHEAT_PLA " Preheat PLA"
-	#define MSG_PREHEAT_ABS " Preheat ABS"
-	#define MSG_MOVE_AXIS " Move Axis      \x7E"
-	#define MSG_MOVE_AXIS " Achsen verfahren   \x7E"
+	#define MSG_MOVE_AXIS " Achse bewegen   \x7E"
 	#define MSG_SPEED " Geschw:"
 	#define MSG_NOZZLE " \002Duese:"
 	#define MSG_NOZZLE1 " \002Duese2:"
 	#define MSG_NOZZLE2 " \002Duese3:"
 	#define MSG_BED " \002Bett:"
-	#define MSG_FAN_SPEED " Luefter geschw.:"
+	#define MSG_FAN_SPEED " Luefter Geschw.:"
 	#define MSG_FLOW " Fluss:"
 	#define MSG_CONTROL " Kontrolle \003"
 	#define MSG_MIN " \002 Min:"
 	#define MSG_VMIN " Vmin:"
 	#define MSG_VTRAV_MIN " VTrav min:"
 	#define MSG_AMAX " Amax "
-	#define MSG_A_RETRACT " A-retract:"
+	#define MSG_A_RETRACT " A-Rueckzug:"
 	#define MSG_XSTEPS " Xsteps/mm:"
 	#define MSG_YSTEPS " Ysteps/mm:"
 	#define MSG_ZSTEPS " Zsteps/mm:"
 	#define MSG_ESTEPS " Esteps/mm:"
-	#define MSG_MAIN_WIDE " Main        \003"
+	#define MSG_MAIN_WIDE " Hauptmenue  \003"
+	#define MSG_RECTRACT_WIDE " Rueckzug    \x7E"
 	#define MSG_TEMPERATURE_WIDE " Temperatur \x7E"
-	#define MSG_MOTION_WIDE " Motion      \x7E"
+	#define MSG_MOTION_WIDE " Bewegung    \x7E"
 	#define MSG_STORE_EPROM " EPROM speichern"
 	#define MSG_LOAD_EPROM "  EPROM laden"
 	#define MSG_RESTORE_FAILSAFE " Standard Konfig."
-	#define MSG_REFRESH "\004Refresh"
+	#define MSG_REFRESH "\004Aktualisieren"
 	#define MSG_WATCH " Beobachten   \003"
-	#define MSG_PREPARE " Prepare \x7E"
-	#define MSG_PREPARE_ALT " Prepare \003"
-	#define MSG_CONTROL_ARROW " Control \x7E"
-	
+	#define MSG_PREPARE " Vorbereiten \x7E"
+	#define MSG_PREPARE_ALT " Vorbereiten \003"
+	#define MSG_CONTROL_ARROW " Kontrolle \x7E"
+	#define MSG_RETRACT_ARROW " Control \x7E"
 	#define MSG_TUNE " Tune    \x7E"
 	#define MSG_STOP_PRINT " Druck stoppen   \x7E"
 	#define MSG_CARD_MENU " SDKarten Menue    \x7E"
 	#define MSG_NO_CARD " Keine SDKarte"
 	#define MSG_SERIAL_ERROR_MENU_STRUCTURE "Fehler in der  Menuestruktur."
-	#define MSG_DWELL "DWELL..."		
-	#define MSG_NO_MOVE "No move."
-	#define MSG_PART_RELEASE "Partial Release"
-	#define MSG_KILLED "KILLED. "
-	#define MSG_STOPPED "STOPPED. "
-	#define MSG_PREHEAT_PLA " Preheat PLA"
-	#define MSG_PREHEAT_ABS " Preheat ABS"
-	#define MSG_STEPPER_RELEASED "Released."
-	
-
+	#define MSG_DWELL "verweilen..."
+	#define MSG_USERWAIT "Warten auf Nutzer..."
+	#define MSG_NO_MOVE "Keine Bewegung."
+	#define MSG_PART_RELEASE "Teil loesen"
+	#define MSG_KILLED "GEKILLT. "
+	#define MSG_STOPPED "GESTOPPT. "
+	#define MSG_STEPPER_RELEASED "Freigegeben."
+	#define MSG_CONTROL_RETRACT  " Rueckzug mm:"
+	#define MSG_CONTROL_RETRACTF " Rueckzug  F:"
+	#define MSG_CONTROL_RETRACT_ZLIFT " Z Sprung mm:"
+	#define MSG_CONTROL_RETRACT_RECOVER " Vorschub +mm:"
+	#define MSG_CONTROL_RETRACT_RECOVERF " Vorschub  F:"
+	#define MSG_AUTORETRACT " AutoRueckzug.:"
 
 // Serial Console Messages
 
 	#define MSG_Z_MIN "z_min:"
 	#define MSG_Z_MAX "z_max:"
 
-	#define MSG_SD_CANT_OPEN_SUBDIR "Cannot open subdir"
-	#define MSG_SD_INIT_FAIL "SD init fail"
-	#define MSG_SD_VOL_INIT_FAIL "volume.init failed"
-	#define MSG_SD_OPENROOT_FAIL "openRoot failed"
-	#define MSG_SD_CARD_OK "SD card ok"
-	#define MSG_SD_WORKDIR_FAIL "workDir open failed"
-	#define MSG_SD_OPEN_FILE_FAIL "open failed, File: "
-	#define MSG_SD_FILE_OPENED "File opened:"
-	#define MSG_SD_SIZE " Size:"
-	#define MSG_SD_FILE_SELECTED "File selected"
-	#define MSG_SD_WRITE_TO_FILE "Writing to file: "
-	#define MSG_SD_PRINTING_BYTE "SD printing byte "
-	#define MSG_SD_NOT_PRINTING "Not SD printing"
-	#define MSG_SD_ERR_WRITE_TO_FILE "error writing to file"
-	#define MSG_SD_CANT_ENTER_SUBDIR "Cannot enter subdir:"
+	#define MSG_SD_CANT_OPEN_SUBDIR "Verz. kein Zugriff"
+	#define MSG_SD_INIT_FAIL "SD init Fehler"
+	#define MSG_SD_VOL_INIT_FAIL "volume.init Fehler"
+	#define MSG_SD_OPENROOT_FAIL "openRoot Fehler"
+	#define MSG_SD_CARD_OK "SDKarte ok"
+	#define MSG_SD_WORKDIR_FAIL "workDir Oeffnen Fehler"
+	#define MSG_SD_OPEN_FILE_FAIL "Fehler: Oeffnen Datei: "
+	#define MSG_SD_FILE_OPENED "Datei geoeffnet:"
+	#define MSG_SD_SIZE " Groesse:"
+	#define MSG_SD_FILE_SELECTED "Datei selektiert"
+	#define MSG_SD_WRITE_TO_FILE "Schreibe in Datei: "
+	#define MSG_SD_PRINTING_BYTE "SD druckt byte "
+	#define MSG_SD_NOT_PRINTING "Druckt nicht von SD"
+	#define MSG_SD_ERR_WRITE_TO_FILE "Datei Schreibfehler"
+	#define MSG_SD_CANT_ENTER_SUBDIR "Kann Verz. nicht wechseln:"
 
-	#define MSG_STEPPER_TO_HIGH "Steprate to high : "
-	#define MSG_ENDSTOPS_HIT "endstops hit: "
-	#define MSG_ERR_COLD_EXTRUDE_STOP " cold extrusion prevented"
-	#define MSG_ERR_LONG_EXTRUDE_STOP " too long extrusion prevented"
+	#define MSG_STEPPER_TO_HIGH "Steprate zu hoch : "
+	#define MSG_ENDSTOPS_HIT "Endstop erreicht: "
+	#define MSG_ERR_COLD_EXTRUDE_STOP " kalter Druck unterbunden"
+	#define MSG_ERR_LONG_EXTRUDE_STOP " langer Druckweg unterbunden"
 
 #endif
-#endif // ifndef LANGUAGE_H
+#endif // ifndef LANGUAGE_H