Removed some messages that shouldn't be translated in the Japanese files.

And made falback to kana work.

Marlin/language_kana.h

 #define MSG_BABYSTEP_Z                      "\xcb\xde\xc4\xde\xb3 Z"                                       // "Babystep Z"
 #define MSG_ENDSTOP_ABORT                   "Endstop abort"
 
+/* These are from language.h. PLEASE DON'T TRANSLATE! All translatable messages can be found in language_en.h
 #define MSG_HEATING                         "\xb6\xc8\xc2\xc1\xad\xb3..."                                  // "Heating..."
 #define MSG_HEATING_COMPLETE                "\xb6\xc8\xc2\xb6\xdd\xd8x\xae\xb3"                            // "Heating done."
 #define MSG_BED_HEATING                     "\xcd\xde\xaf\xc4\xde\xb6\xc8\xc2\xc1\xad\xb3"                 // "Bed Heating."
 #define MSG_BED_DONE                        "\xcd\xde\xaf\xc4\xde\xb6\xc8\xc2\xb6\xdd\xd8x\xae\xb3"        // "Bed done."
 #define MSG_ENDSTOPS_HIT                    "endstops hit: "
+                   ^ typho
+*/
 
 #ifdef DELTA_CALIBRATION_MENU
     #define MSG_DELTA_CALIBRATE             "Delta Calibration"

Marlin/language_kana_utf8.h

 #define MSG_BABYSTEP_Z                      "ヒ゛ト゛ウ Z"                    // "Babystep Z"
 #define MSG_ENDSTOP_ABORT                   "Endstop abort"
 
-#define MSG_HEATING                         "セネシチユウ..."                // "Heating..."
-#define MSG_HEATING_COMPLETE                "セネシセンリxョウ"                // "Heating done."
-#define MSG_BED_HEATING                     "ヘ゛ツト゛セネシチユウ"             // "Bed Heating."  5C 33 34 33
-#define MSG_BED_DONE                        "ヘ゛ツト゛セネシセンリxョウ"           // "Bed done."
-#define MSG_ENDSTOPS_HIT                    "endstops hit: "
-
 #ifdef DELTA_CALIBRATION_MENU
     #define MSG_DELTA_CALIBRATE             "Delta Calibration"
     #define MSG_DELTA_CALIBRATE_X           "Calibrate X"

Marlin/language_kanji.h

  * Please note these are limited to 17 characters!
  *
  */
+#include "Configuration.h" 
 #ifndef DOGLCD
   #include "language_kana.h" // fallback to kana
   #define LANGUAGE_KANJI_H
 #define MSG_BABYSTEP_Y                      "\xcb\xde\xc4\xde\xb3 Y"                                       // "Babystep Y"
 #define MSG_BABYSTEP_Z                      "\xcb\xde\xc4\xde\xb3 Z"                                       // "Babystep Z"
 #define MSG_ENDSTOP_ABORT                   "Endstop abort"
+
+/* These are from language.h. PLEASE DON'T TRANSLATE!  All translatable messages can be found in language_en.h
 #define MSG_HEATING                         "\xb6\xe5\x94\x95\x89..."                                      // "Heating..."
 #define MSG_HEATING_COMPLETE                "\xb6\xe5\x94\x95\xa4\xa5\x7f"                                 // "Heating done."
 #define MSG_BED_HEATING                     "\xcd\xde\xaf\xc4\xde\xb6\xe5\x94\x95\x89"                     // "Bed Heating."
 #define MSG_BED_DONE                        "\xcd\xde\xaf\xc4\xde\xb6\xe5\x94\x95\xa4\xa5\x7f"             // "Bed done."
 #define MSG_ENDSTOPS_HIT                    "endstops hit: "
+                   ^ typho
+*/
 
 #ifdef DELTA_CALIBRATION_MENU
     #define MSG_DELTA_CALIBRATE             "Delta Calibration"