     version_history_for: "버전 히스토리 : "
 #    select_changes: "Select two changes below to see the difference."
 #    undo_prefix: "Undo"
-#    undo_shortcut: "(Ctrl+Z)"
+    undo_shortcut: "(Ctrl+Z)"
 #    redo_prefix: "Redo"
-#    redo_shortcut: "(Ctrl+Shift+Z)"
+    redo_shortcut: "(Ctrl+Shift+Z)"
 #    play_preview: "Play preview of current level"
     result: "결과"
     results: "결과들"

#    multiplayer_caption: "Play with friends!"
#    auth_caption: "Save your progress."

#  leaderboard:
#    leaderboard: "Leaderboard"
#    view_other_solutions: "View Other Solutions"
#    scores: "Scores"
#    top_players: "Top Players by"
#    day: "Today"
#    week: "This Week"
#    all: "All-Time"
#    time: "Time"
#    damage_taken: "Damage Taken"


  choose_hero:
#    choose_hero: "Choose Your Hero"
    programming_language: "프로그래밍 언어"
#    programming_language_description: "Which programming language do you want to use?"
#    default: "Default"
#    experimental: "Experimental"
