diff --git a/src/lang/english_US.txt b/src/lang/english_US.txt
--- a/src/lang/english_US.txt
+++ b/src/lang/english_US.txt
@@ -5085,6 +5085,8 @@ STR_ERROR_CAN_T_COPY_ORDER_LIST         
 STR_ERROR_TOO_FAR_FROM_PREVIOUS_DESTINATION                     :{WHITE}... too far from previous destination
 STR_ERROR_AIRCRAFT_NOT_ENOUGH_RANGE                             :{WHITE}... aircraft has not enough range
 
+# Extra messages which go on the third line of errors, explaining why orders failed
+
 # Timetable related errors
 STR_ERROR_CAN_T_TIMETABLE_VEHICLE                               :{WHITE}Can't timetable vehicle...
 STR_ERROR_TIMETABLE_ONLY_WAIT_AT_STATIONS                       :{WHITE}Vehicles can only wait at stations