diff --git a/src/lang/bulgarian.txt b/src/lang/bulgarian.txt
--- a/src/lang/bulgarian.txt
+++ b/src/lang/bulgarian.txt
@@ -1577,9 +1577,9 @@ STR_CONFIG_SETTING_LOCALISATION_UNITS_HE
 STR_CONFIG_SETTING_LOCALISATION_UNITS_HEIGHT_METRIC             :Metric (m)
 STR_CONFIG_SETTING_LOCALISATION_UNITS_HEIGHT_SI                 :SI (m)
 
-STR_CONFIG_SETTING_GUI                                          :{ORANGE}Интерфейс
+STR_CONFIG_SETTING_INTERFACE                                    :{ORANGE}Интерфейс
 STR_CONFIG_SETTING_LOCALISATION                                 :{ORANGE}Позициониране
-STR_CONFIG_SETTING_CONSTRUCTION                                 :{ORANGE}Строене
+STR_CONFIG_SETTING_INTERFACE_CONSTRUCTION                       :{ORANGE}Строене
 STR_CONFIG_SETTING_VEHICLES                                     :{ORANGE}Автомобили
 STR_CONFIG_SETTING_STATIONS                                     :{ORANGE}Станции
 STR_CONFIG_SETTING_ECONOMY                                      :{ORANGE}Икономика
@@ -1594,8 +1594,8 @@ STR_CONFIG_SETTING_VEHICLES_AUTORENEW                           :{ORANGE}Автоматично подновяване
 STR_CONFIG_SETTING_VEHICLES_SERVICING                           :{ORANGE}Сервизиране
 STR_CONFIG_SETTING_VEHICLES_ROUTING                             :{ORANGE}Маршрутизация
 STR_CONFIG_SETTING_VEHICLES_TRAINS                              :{ORANGE}Влакове
-STR_CONFIG_SETTING_ECONOMY_TOWNS                                :{ORANGE}Градове
-STR_CONFIG_SETTING_ECONOMY_INDUSTRIES                           :{ORANGE}Индустрии
+STR_CONFIG_SETTING_ENVIRONMENT_TOWNS                            :{ORANGE}Градове
+STR_CONFIG_SETTING_ENVIRONMENT_INDUSTRIES                       :{ORANGE}Индустрии
 
 STR_CONFIG_SETTING_PATHFINDER_OPF                               :Оригинален
 STR_CONFIG_SETTING_PATHFINDER_NPF                               :NPF