diff --git a/src/lang/ido.txt b/src/lang/ido.txt
--- a/src/lang/ido.txt
+++ b/src/lang/ido.txt
@@ -1582,6 +1582,8 @@ STR_ERROR_TOO_MANY_VEHICLES_IN_GAME     
 # Order related errors
 
 
+# Extra messages which go on the third line of errors, explaining why orders failed
+
 # Timetable related errors
 
 # Sign related errors