Update French language

Based on #9373 by @nikkoura

Marlin/src/lcd/language/language_fr.h

 #define MSG_PREHEAT_2_SETTINGS              _UxGT("Regl. prech. ABS")
 #define MSG_COOLDOWN                        _UxGT("Refroidir")
 #define MSG_SWITCH_PS_ON                    _UxGT("Allumer alim.")
-#define MSG_SWITCH_PS_OFF                   _UxGT("eteindre alim.")
-#define MSG_EXTRUDE                         _UxGT("extrusion")
+#define MSG_SWITCH_PS_OFF                   _UxGT("Eteindre alim.")
+#define MSG_EXTRUDE                         _UxGT("Extrusion")
 #define MSG_RETRACT                         _UxGT("Retraction")
 #define MSG_MOVE_AXIS                       _UxGT("Deplacer un axe")
 #define MSG_BED_LEVELING                    _UxGT("Regl. Niv. lit")
 #define MSG_UBL_MANUAL_MESH                 _UxGT("Maillage manuel")
 #define MSG_UBL_BC_INSERT                   _UxGT("Poser cale & mesurer")
 #define MSG_UBL_BC_INSERT2                  _UxGT("Mesure")
-#define MSG_UBL_BC_REMOVE                   _UxGT("oter et mesurer lit")
+#define MSG_UBL_BC_REMOVE                   _UxGT("Oter et mesurer lit")
 #define MSG_UBL_MOVING_TO_NEXT              _UxGT("Aller au suivant")
 #define MSG_UBL_ACTIVATE_MESH               _UxGT("Activer l'UBL")
 #define MSG_UBL_DEACTIVATE_MESH             _UxGT("Desactiver l'UBL")
 #define MSG_UBL_CUSTOM_HOTEND_TEMP          MSG_UBL_SET_HOTEND_TEMP
 #define MSG_UBL_EDIT_CUSTOM_MESH            _UxGT("Editer maille perso")
 #define MSG_UBL_FINE_TUNE_MESH              _UxGT("Reglage fin maille")
-#define MSG_UBL_DONE_EDITING_MESH           _UxGT("Termier maille")
+#define MSG_UBL_DONE_EDITING_MESH           _UxGT("Terminer maille")
 #define MSG_UBL_BUILD_CUSTOM_MESH           _UxGT("Creer maille perso")
 #define MSG_UBL_BUILD_MESH_MENU             _UxGT("Creer maille")
 #define MSG_UBL_BUILD_PLA_MESH              _UxGT("Creer maille PLA")
 #define MSG_MOVE_01MM                       _UxGT("Depl. 0.1mm")
 #define MSG_MOVE_1MM                        _UxGT("Depl. 1mm")
 #define MSG_MOVE_10MM                       _UxGT("Depl. 10mm")
-#define MSG_SPEED                           _UxGT(" Vitesse")
+#define MSG_SPEED                           _UxGT("Vitesse")
 #define MSG_BED_Z                           _UxGT("Lit Z")
 #define MSG_NOZZLE                          _UxGT("Buse")
 #define MSG_BED                             _UxGT("Lit")
 #define MSG_PRINT_ABORTED                   _UxGT("Impr. Annulee")
 #define MSG_NO_MOVE                         _UxGT("Moteurs bloques.")
 #define MSG_KILLED                          _UxGT("MORT.")
-#define MSG_STOPPED                         _UxGT("STOPPe.")
+#define MSG_STOPPED                         _UxGT("STOPPE.")
 #define MSG_CONTROL_RETRACT                 _UxGT("Retraction mm")
 #define MSG_CONTROL_RETRACT_SWAP            _UxGT("Ech. Retr. mm")
 #define MSG_CONTROL_RETRACTF                _UxGT("Retraction V")
 #define MSG_CONTROL_RETRACT_RECOVER         _UxGT("UnRet mm")
 #define MSG_CONTROL_RETRACT_RECOVER_SWAP    _UxGT("Ech. UnRet mm")
 #define MSG_CONTROL_RETRACT_RECOVERF        _UxGT("UnRet V")
-#define MSG_CONTROL_RETRACT_RECOVER_SWAPF   _UxGT("Ech. Retr. V")
+#define MSG_CONTROL_RETRACT_RECOVER_SWAPF   _UxGT("Ech. UnRet V")
 #define MSG_AUTORETRACT                     _UxGT("Retract. Auto.")
 #define MSG_FILAMENTCHANGE                  _UxGT("Changer filament")
 #define MSG_INIT_SDCARD                     _UxGT("Init. la carte SD")
 #define MSG_ERR_MINTEMP_BED                 _UxGT("Err: TEMP. MIN LIT")
 #define MSG_ERR_Z_HOMING                    _UxGT("G28 Z interdit")
 
-#define MSG_HALTED                          _UxGT("IMPR. STOPPeE")
+#define MSG_HALTED                          _UxGT("IMPR. STOPPEE")
 #define MSG_PLEASE_RESET                    _UxGT("RaZ. SVP")
 #define MSG_SHORT_DAY                       _UxGT("j") // One character only
 #define MSG_SHORT_HOUR                      _UxGT("h") // One character only

Marlin/src/lcd/language/language_fr_utf8.h

 #define MSG_UBL_CUSTOM_HOTEND_TEMP          MSG_UBL_SET_HOTEND_TEMP
 #define MSG_UBL_EDIT_CUSTOM_MESH            _UxGT("Editer maille perso")
 #define MSG_UBL_FINE_TUNE_MESH              _UxGT("Réglage fin maille")
-#define MSG_UBL_DONE_EDITING_MESH           _UxGT("Termier maille")
+#define MSG_UBL_DONE_EDITING_MESH           _UxGT("Terminer maille")
 #define MSG_UBL_BUILD_CUSTOM_MESH           _UxGT("Créer maille perso")
 #define MSG_UBL_BUILD_MESH_MENU             _UxGT("Créer maille")
 #define MSG_UBL_BUILD_PLA_MESH              _UxGT("Créer maille PLA")
 #define MSG_MOVE_01MM                       _UxGT("Dépl. 0.1mm")
 #define MSG_MOVE_1MM                        _UxGT("Dépl. 1mm")
 #define MSG_MOVE_10MM                       _UxGT("Dépl. 10mm")
-#define MSG_SPEED                           _UxGT(" Vitesse")
+#define MSG_SPEED                           _UxGT("Vitesse")
 #define MSG_BED_Z                           _UxGT("Lit Z")
 #define MSG_NOZZLE                          _UxGT("Buse")
 #define MSG_BED                             _UxGT("Lit")