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
@@ -386,7 +386,7 @@ STR_FILE_MENU_EXIT                      
 
 # map menu
 STR_MAP_MENU_MAP_OF_WORLD                                       :Map of world
-STR_MAP_MENU_EXTRA_VIEW_PORT                                    :Extra viewport
+STR_MAP_MENU_EXTRA_VIEWPORT                                     :Extra viewport
 STR_MAP_MENU_LINGRAPH_LEGEND                                    :Cargo Flow Legend
 STR_MAP_MENU_SIGN_LIST                                          :Sign list
 
@@ -860,7 +860,7 @@ STR_NEWS_EXCLUSIVE_RIGHTS_TITLE         
 STR_NEWS_EXCLUSIVE_RIGHTS_DESCRIPTION                           :{BIG_FONT}{BLACK}Local authority of {TOWN} signs contract with {STRING} for one year of exclusive transport rights!
 
 # Extra view window
-STR_EXTRA_VIEW_PORT_TITLE                                       :{WHITE}Viewport {COMMA}
+STR_EXTRA_VIEWPORT_TITLE                                        :{WHITE}Viewport {COMMA}
 STR_EXTRA_VIEW_MOVE_VIEW_TO_MAIN                                :{BLACK}Copy to viewport
 STR_EXTRA_VIEW_MOVE_VIEW_TO_MAIN_TT                             :{BLACK}Copy the location of the main view to this viewport
 STR_EXTRA_VIEW_MOVE_MAIN_TO_VIEW                                :{BLACK}Paste from viewport