diff --git a/src/lang/english.txt b/src/lang/english.txt
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -265,6 +265,7 @@ STR_SHOW_HIDDEN_ENGINES_VEHICLE_AIRCRAFT
 STR_BUTTON_DEFAULT                                              :{BLACK}Default
 STR_BUTTON_CANCEL                                               :{BLACK}Cancel
 STR_BUTTON_OK                                                   :{BLACK}OK
+STR_WARNING_PASSWORD_SECURITY                                   :{YELLOW}Warning: Server administrators may be{}able to read any text entered here.
 
 # On screen keyboard window
 STR_OSK_KEYBOARD_LAYOUT                                         :`1234567890-=\qwertyuiop[]asdfghjkl;'  zxcvbnm,./ .