diff --git a/src/lang/english.txt b/src/lang/english.txt
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -3112,9 +3112,12 @@ STR_REPLACE_HELP_LEFT_ARRAY             
 STR_REPLACE_HELP_RIGHT_ARRAY                                    :{BLACK}Select the new engine type you would like to use in place of the left selected engine type
 
 STR_REPLACE_VEHICLES_START                                      :{BLACK}Start Replacing Vehicles
+STR_REPLACE_VEHICLES_NOW                                        :Replace all vehicles now
+STR_REPLACE_VEHICLES_WHEN_OLD                                   :Replace only old vehicles
 STR_REPLACE_HELP_START_BUTTON                                   :{BLACK}Press to begin replacement of the left selected engine type with the right selected engine type
 STR_REPLACE_NOT_REPLACING                                       :{BLACK}Not replacing
 STR_REPLACE_NOT_REPLACING_VEHICLE_SELECTED                      :{BLACK}No vehicle selected
+STR_REPLACE_REPLACING_WHEN_OLD                                  :{ENGINE} when old
 STR_REPLACE_VEHICLES_STOP                                       :{BLACK}Stop Replacing Vehicles
 STR_REPLACE_HELP_STOP_BUTTON                                    :{BLACK}Press to stop the replacement of the engine type selected on the left