Language changes

Marlin/src/core/language.h

 #define MSG_KILL_BUTTON                     "KILL caused by KILL button/pin"
 
 // temperature.cpp strings
-#define MSG_PID_AUTOTUNE                    "PID Autotune"
-#define MSG_PID_AUTOTUNE_START              MSG_PID_AUTOTUNE " start"
-#define MSG_PID_AUTOTUNE_FAILED             MSG_PID_AUTOTUNE " failed!"
+#define MSG_PID_AUTOTUNE_PREFIX             "PID Autotune"
+#define MSG_PID_AUTOTUNE_START              MSG_PID_AUTOTUNE_PREFIX " start"
+#define MSG_PID_AUTOTUNE_FAILED             MSG_PID_AUTOTUNE_PREFIX " failed!"
 #define MSG_PID_BAD_EXTRUDER_NUM            MSG_PID_AUTOTUNE_FAILED " Bad extruder number"
 #define MSG_PID_TEMP_TOO_HIGH               MSG_PID_AUTOTUNE_FAILED " Temperature too high"
 #define MSG_PID_TIMEOUT                     MSG_PID_AUTOTUNE_FAILED " timeout"
 #define MSG_KI                              " Ki: "
 #define MSG_KD                              " Kd: "
 #define MSG_AT                              " @:"
-#define MSG_PID_AUTOTUNE_FINISHED           MSG_PID_AUTOTUNE " finished! Put the last Kp, Ki and Kd constants from below into Configuration.h"
+#define MSG_PID_AUTOTUNE_FINISHED           MSG_PID_AUTOTUNE_PREFIX " finished! Put the last Kp, Ki and Kd constants from below into Configuration.h"
 #define MSG_PID_DEBUG                       " PID_DEBUG "
 #define MSG_PID_DEBUG_INPUT                 ": Input "
 #define MSG_PID_DEBUG_OUTPUT                " Output "
  *
  */
 #if ENABLED(NUMBER_TOOLS_FROM_0)
+  #define LCD_FIRST_TOOL '0'
   #define LCD_STR_N0 "0"
   #define LCD_STR_N1 "1"
   #define LCD_STR_N2 "2"
   #define LCD_STR_N4 "4"
   #define LCD_STR_N5 "5"
 #else
+  #define LCD_FIRST_TOOL '1'
   #define LCD_STR_N0 "1"
   #define LCD_STR_N1 "2"
   #define LCD_STR_N2 "3"

Marlin/src/lcd/language/language_en.h

   PROGMEM Language_Str MSG_BACKLASH_CORRECTION             = _UxGT("Correction");
   PROGMEM Language_Str MSG_BACKLASH_SMOOTHING              = _UxGT("Smoothing");
 }
+
+#if FAN_COUNT == 1
+  #define MSG_FIRST_FAN_SPEED       MSG_FAN_SPEED
+  #define MSG_FIRST_EXTRA_FAN_SPEED MSG_EXTRA_FAN_SPEED
+#else
+  #define MSG_FIRST_FAN_SPEED       MSG_FAN_SPEED_1
+  #define MSG_FIRST_EXTRA_FAN_SPEED MSG_EXTRA_FAN_SPEED_1
+#endif

Marlin/src/lcd/menu/menu_temperature.cpp

   #if FAN_COUNT > 0
     #if HAS_FAN0
       editable.uint8 = thermalManager.fan_speed[0];
-      EDIT_ITEM_FAST(percent, MSG_FAN_SPEED_1, &editable.uint8, 0, 255, [](){ thermalManager.set_fan_speed(0, editable.uint8); });
+      EDIT_ITEM_FAST(percent, MSG_FIRST_FAN_SPEED, &editable.uint8, 0, 255, [](){ thermalManager.set_fan_speed(0, editable.uint8); });
       #if ENABLED(EXTRA_FAN_SPEED)
-        EDIT_ITEM_FAST(percent, MSG_EXTRA_FAN_SPEED_1, &thermalManager.new_fan_speed[0], 3, 255);
+        EDIT_ITEM_FAST(percent, MSG_FIRST_EXTRA_FAN_SPEED, &thermalManager.new_fan_speed[0], 3, 255);
       #endif
     #endif
     #if HAS_FAN1

Marlin/src/lcd/menu/menu_tune.cpp

   //
   #if FAN_COUNT > 0
     #if HAS_FAN0
-      #if FAN_COUNT == 1
-        #define MSG_FIRST_FAN_SPEED       MSG_FAN_SPEED
-        #define MSG_FIRST_EXTRA_FAN_SPEED MSG_EXTRA_FAN_SPEED
-      #else
-        #define MSG_FIRST_FAN_SPEED       MSG_FAN_SPEED_1
-        #define MSG_FIRST_EXTRA_FAN_SPEED MSG_EXTRA_FAN_SPEED_1
-      #endif
       editable.uint8 = thermalManager.fan_speed[0];
       EDIT_ITEM_FAST(percent, MSG_FIRST_FAN_SPEED, &editable.uint8, 0, 255, [](){ thermalManager.set_fan_speed(0, editable.uint8); });
       #if ENABLED(EXTRA_FAN_SPEED)