diff --git a/src/lang/catalan.txt b/src/lang/catalan.txt
--- a/src/lang/catalan.txt
+++ b/src/lang/catalan.txt
@@ -3361,4 +3361,8 @@ STR_VEHICLE_NAME                        
 
 STR_NAME_MUST_BE_UNIQUE                                         :{WHITE}El nom ha de ser únic
 
+#### Improved sign GUI
+STR_NEXT_SIGN_TOOLTIP                                           :{BLACK}Ves a la propera senyal
+STR_PREVIOUS_SIGN_TOOLTIP                                       :{BLACK}Ves a la senyal anterior
+
 ########