diff --git a/src/lang/unfinished/frisian.txt b/src/lang/unfinished/frisian.txt
--- a/src/lang/unfinished/frisian.txt
+++ b/src/lang/unfinished/frisian.txt
@@ -310,6 +310,8 @@ STR_SORT_BY_RANGE                       
 STR_SORT_BY_POPULATION                                          :Ynwenners
 STR_SORT_BY_RATING                                              :Rang
 
+# Group by options for vehicle list
+
 # Tooltips for the main toolbar
 STR_TOOLBAR_TOOLTIP_PAUSE_GAME                                  :{BLACK}Spul skoftsjen
 STR_TOOLBAR_TOOLTIP_FORWARD                                     :{BLACK}Tiid hurder rinne litte