diff --git a/src/lang/serbian.txt b/src/lang/serbian.txt
--- a/src/lang/serbian.txt
+++ b/src/lang/serbian.txt
@@ -2874,6 +2874,9 @@ STR_GOALS_TOOLTIP_CLICK_ON_SERVICE_TO_CENTER                    :{BLACK}Klikom na cilj premešta se glavni pogled na fabriku/naselje/pločicu. Ctrl+Kilk otvara novi pogled na lokaciju fabrike/naselja/pločice
 
 # Goal question window
 STR_GOAL_QUESTION_CAPTION_QUESTION                              :Pitanje
+STR_GOAL_QUESTION_CAPTION_INFORMATION                           :Obaveštenje
+STR_GOAL_QUESTION_CAPTION_WARNING                               :Upozorenje
+STR_GOAL_QUESTION_CAPTION_ERROR                                 :Greška
 
 ### Start of Goal Question button list
 STR_GOAL_QUESTION_BUTTON_CANCEL                                 :Otkaži