diff --git a/src/lang/english_AU.txt b/src/lang/english_AU.txt
--- a/src/lang/english_AU.txt
+++ b/src/lang/english_AU.txt
@@ -4234,6 +4234,16 @@ STR_ERROR_CAN_T_DELETE_SIGN             
 # Translatable comment for OpenTTD's desktop shortcut
 STR_DESKTOP_SHORTCUT_COMMENT                                    :A simulation game based on Transport Tycoon Deluxe
 
+# Translatable descriptions in media/baseset/*.ob* files
+STR_BASEGRAPHICS_DOS_DESCRIPTION                                :Original Transport Tycoon Deluxe DOS edition graphics.
+STR_BASEGRAPHICS_DOS_DE_DESCRIPTION                             :Original Transport Tycoon Deluxe DOS (German) edition graphics.
+STR_BASEGRAPHICS_WIN_DESCRIPTION                                :Original Transport Tycoon Deluxe Windows edition graphics.
+STR_BASESOUNDS_DOS_DESCRIPTION                                  :Original Transport Tycoon Deluxe DOS edition sounds.
+STR_BASESOUNDS_WIN_DESCRIPTION                                  :Original Transport Tycoon Deluxe Windows edition sounds.
+STR_BASESOUNDS_NONE_DESCRIPTION                                 :A sound pack without any sounds.
+STR_BASEMUSIC_WIN_DESCRIPTION                                   :Original Transport Tycoon Deluxe Windows edition music.
+STR_BASEMUSIC_NONE_DESCRIPTION                                  :A music pack without actual music.
+
 ##id 0x2000
 # Town building names
 STR_TOWN_BUILDING_NAME_TALL_OFFICE_BLOCK_1                      :Tall office block